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Öhberg, Fredrik
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Publications (10 of 42) Show all publications
Grip, H., Nilsson, K. G., Häger, C. G., Lundström, R. & Öhberg, F. (2019). Does the Femoral Head Size in Hip Arthroplasty Influence Lower Body Movements during Squats, Gait and Stair Walking?: A Clinical Pilot Study Based on Wearable Motion Sensors. Sensors, 19(14), Article ID 3240.
Open this publication in new window or tab >>Does the Femoral Head Size in Hip Arthroplasty Influence Lower Body Movements during Squats, Gait and Stair Walking?: A Clinical Pilot Study Based on Wearable Motion Sensors
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2019 (English)In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 19, no 14, article id 3240Article in journal (Refereed) Published
Abstract [en]

A hip prosthesis design with larger femoral head size may improve functional outcomes compared to the conventional total hip arthroplasty (THA) design. Our aim was to compare the range of motion (RoM) in lower body joints during squats, gait and stair walking using a wearable movement analysis system based on inertial measurement units (IMUs) in three age-matched male groups: 6 males with a conventional THA (THAC), 9 with a large femoral head (LFH) design, and 8 hip- and knee-asymptomatic controls (CTRL). We hypothesized that the LFH design would allow a greater hip RoM, providing movement patterns more like CTRL, and a larger side difference in hip RoM in THAC when compared to LFH and controls. IMUs were attached to the pelvis, thighs and shanks during five trials of squats, gait, and stair ascending/descending performed at self-selected speed. THAC and LFH participants completed the Hip dysfunction and Osteoarthritis Outcome Score (HOOS). The results showed a larger hip RoM during squats in LFH compared to THAC. Side differences in LFH and THAC groups (operated vs. non-operated side) indicated that movement function was not fully recovered in either group, further corroborated by non-maximal mean HOOS scores (LFH: 83 +/- 13, THAC: 84 +/- 19 groups, vs. normal function 100). The IMU system may have the potential to enhance clinical movement evaluations as an adjunct to clinical scales.

Place, publisher, year, edition, pages
MDPI, 2019
Keywords
MEMS, gyroscopes, accelerometers, total hip arthroplasty, movement analysis
National Category
Orthopaedics
Identifiers
urn:nbn:se:umu:diva-162882 (URN)10.3390/s19143240 (DOI)000479160300207 ()31340548 (PubMedID)
Available from: 2019-09-05 Created: 2019-09-05 Last updated: 2019-09-05Bibliographically approved
Wahlström, V., Bergman, F., Öhberg, F., Eskilsson, T., Olsson, T. & Slunga-Järvholm, L. (2019). Effects of a multicomponent physical activity promoting program on sedentary behavior, physical activity and body measures: a longitudinal study in different office types. Scandinavian Journal of Work, Environment and Health, Article ID 3808.
Open this publication in new window or tab >>Effects of a multicomponent physical activity promoting program on sedentary behavior, physical activity and body measures: a longitudinal study in different office types
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2019 (English)In: Scandinavian Journal of Work, Environment and Health, ISSN 0355-3140, E-ISSN 1795-990X, article id 3808Article in journal (Refereed) Epub ahead of print
Abstract [en]

Objectives The aim of this study was to investigate effects of a multicomponent program promoting physical activity on sedentary behavior, physical activity, and body measures, when relocating from cell offices to either a flex or cell office. Methods The Active Office Design (AOD) study is a longitudinal non-randomized controlled study performed in a municipality in northern Sweden. A subsample of 86 participants were randomly recruited from the AOD study to objectively measure sedentary behavior and physical activity, using ActivPAL and ActiGraph, before and after relocation to the two different office types. The multicomponent program promoting physical activity was performed in both offices. Data were analyzed using linear mixed models. Results Eighteen months after relocation, the total number of steps per work day increased by 21% in the flex office and 3% in the cell office group, compared to baseline. Moderate and vigorous physical activity (MVPA) during work hours increased by 42% in the flex office group and 19% in the cell office group. No changes were seen regarding sitting time at work. Small additive effects for walking and MVPA were seen for both groups during non-work time. Weight increased in the flex office group. Conclusions This long-term study shows that a multicomponent workplace intervention can lead to increased walking time, steps, and MVPA in a flex compared to a cell office. Small additive increases of physical activity were seen during non-work time in both groups. More long-term controlled studies are needed to confirm these results.

Place, publisher, year, edition, pages
the Nordic Association of Occupational Safety and Health (NOROSH), 2019
National Category
Occupational Health and Environmental Health Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
urn:nbn:se:umu:diva-157427 (URN)10.5271/sjweh.3808 (DOI)30860269 (PubMedID)
Available from: 2019-03-19 Created: 2019-03-19 Last updated: 2019-06-24
Öhberg, F., Bäcklund, T., Sundström, N. & Grip, H. (2019). Portable Sensors Add Reliable Kinematic Measures to the Assessment of Upper Extremity Function. Sensors, 19(5), Article ID 1241.
Open this publication in new window or tab >>Portable Sensors Add Reliable Kinematic Measures to the Assessment of Upper Extremity Function
2019 (English)In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 19, no 5, article id 1241Article in journal (Refereed) Published
Abstract [en]

Ordinal scales with low resolution are used to assess arm function in clinic. These scales may be improved by adding objective kinematic measures. The aim was to analyze within-subject, inter-rater and overall reliability (i.e., including within-subject and inter-rater reliability) and check the system's validity of kinematic measures from inertial sensors for two such protocols on one person. Twenty healthy volunteers repeatedly performed two tasks, finger-to-nose and drinking, during two test sessions with two different raters. Five inertial sensors, on the forearms, upper arms and xiphoid process were used. Comparisons against an optical camera system evaluated the measurement validity. Cycle time, range of motion (ROM) in shoulder and elbow were calculated. Bland-Altman plots and linear mixed models including the generalizability (G) coefficient evaluated the reliability of the measures. Within-subject reliability was good to excellent in both tests (G = 0.80-0.97) and may serve as a baseline when assessing upper extremities in future patient groups. Overall reliability was acceptable to excellent (G = 0.77-0.94) for all parameters except elbow axial rotation in finger-to-nose task and both elbow axial rotation and flexion/extension in drinking task, mainly due to poor inter-rater reliability in these parameters. The low to good reliability for elbow ROM probably relates to high within-subject variability. The sensors provided good to excellent measures of cycle time and shoulder ROM in non-disabled individuals and thus have the potential to improve today's assessment of arm function.

Place, publisher, year, edition, pages
MDPI, 2019
Keywords
inter-rater reliability, inertial sensor, kinematics, upper limb, arm function
National Category
Physiotherapy
Identifiers
urn:nbn:se:umu:diva-158105 (URN)10.3390/s19051241 (DOI)000462540400260 ()30870999 (PubMedID)
Available from: 2019-04-12 Created: 2019-04-12 Last updated: 2019-04-12Bibliographically approved
Wahlström, V., Bergman, F., Öhberg, F., Stenlund, T., Olsson, T. & Slunga-Järvholm, L. (2018). A longitudinal study of physical activity in different office types. Journal of Physical Activity and Health, 15(10), S62-S62
Open this publication in new window or tab >>A longitudinal study of physical activity in different office types
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2018 (English)In: Journal of Physical Activity and Health, ISSN 1543-3080, E-ISSN 1543-5474, Vol. 15, no 10, p. S62-S62Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
Human Kinetics, 2018
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
urn:nbn:se:umu:diva-152984 (URN)000446516100206 ()
Funder
AFA Insurance
Note

Supplement: 1

Available from: 2018-11-01 Created: 2018-11-01 Last updated: 2018-11-19Bibliographically approved
Stenlund, T., Öhberg, F., Lundström, R., Lindroos, O., Häger, C., Neely, G. & Rehn, B. (2018). Double-sided Mechanical Shocks Provoke Larger Seated Postural Reactions Compared to Single-Sided Mechanical Shocks. Spine, 43(8), E482-E487
Open this publication in new window or tab >>Double-sided Mechanical Shocks Provoke Larger Seated Postural Reactions Compared to Single-Sided Mechanical Shocks
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2018 (English)In: Spine, ISSN 0362-2436, E-ISSN 1528-1159, Vol. 43, no 8, p. E482-E487Article in journal (Refereed) Published
Abstract [en]

STUDY DESIGN: Human volunteers were exposed experimentally to single-sided mechanical shocks (SSMS) and double-sided mechanical shocks (DSMS) while seated.

OBJECTIVE: To describe and contrast seated postural reactions due to SSMS or DSMS in healthy male adults.

SUMMARY OF BACKGROUND DATA: Mechanical shocks to the body, caused when driving on irregular terrain, are suggested to be hazardous to the spine and may be associated with the reported musculoskeletal pain of the back and neck among professional drivers. However, very little is known about the characteristics of seated postural reactions and the biomechanical effects caused by mechanical shocks.

METHODS: Twenty healthy male subjects (18-43 years old) were exposed while seated to 5 SSMS and 15 DSMS in lateral directions. The second acceleration in the DSMS was in the opposite direction to the first acceleration and was either fast, medium or slow depending on the speed of direction change. Surface electromyography (EMG) was recorded in muscles of the upper neck, trapezius, erector spinae and external oblique while kinematics were recorded with inertial sensors placed at the neck, trunk and pelvis. Muscle activity was normalized to maximum voluntary contractions (MVC).

RESULTS: The EMG amplitudes were significantly higher (0.6-1%; p < 0.001) for the fast DSMS compared to all other shocks. Range of motion (ROM) of the neck and trunk was greater during the DSMS compared to the SSMS. Evoked muscle activity was less than 2% MVC in the trapezius, less than 10% MVC in the erector spinae and upper neck while the activity exceeded 10% MVC in the external oblique muscles.

CONCLUSION: Fast DSMS in lateral directions appear more demanding compared to SSMS, demonstrating augmented seated postural reactions. However, the present mechanical shocks employed did not seem to induce postural reactions with regard to ROM or muscle activity of a magnitude likely to cause musculoskeletal overload.

LEVEL OF EVIDENCE: 4.

National Category
Physiotherapy
Research subject
physiotherapy
Identifiers
urn:nbn:se:umu:diva-144712 (URN)10.1097/BRS.0000000000002396 (DOI)000440520600008 ()28858181 (PubMedID)
Funder
AFA Insurance
Available from: 2018-02-12 Created: 2018-02-12 Last updated: 2018-09-13Bibliographically approved
Bergman, F., Wahlström, V., Wennberg, P., Boraxbekk, C.-J., Sörlin, A., Öhberg, F. & Olsson, T. (2018). Increasing Physical Activity In Office Workers - An RCT Of Treadmill Workstations. Paper presented at Annual Meeting of the American-College-of-Sports-Medicine (ACSM), MAY 31, 2018, Minneapolis, MN. Medicine & Science in Sports & Exercise, 50(5), 47-47
Open this publication in new window or tab >>Increasing Physical Activity In Office Workers - An RCT Of Treadmill Workstations
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2018 (English)In: Medicine & Science in Sports & Exercise, ISSN 0195-9131, E-ISSN 1530-0315, Vol. 50, no 5, p. 47-47Article in journal, Meeting abstract (Other academic) Published
Abstract [en]

PURPOSE: Our primary hypothesis was that an intervention with treadmill workstations would increase time spent walking. Secondary hypotheses were a decrease in time spent sitting with a concomitant increase in time spent standing and in light intensity physical activity (LPA) leading to positive effects on body measurements and body composition.

METHODS: The intervention group received a treadmill workstation at their office desk during 13 months. Daily time spent sitting, standing and walking and number of steps was measured with activPAL®. Daily time in LPA and MVPA was measured with Actigraph®. Body weight, BMI and waist circumference were measured according to standardized protocols. Dual X-ray Absorptiometry was used to estimate body composition. Mixed models was used for the statistical analysis, with group, day of week (weekday/ weekend), time point and gender as fixed effects and age as a covariate. p<0.05 was considered significant.

RESULTS: Eighty participants were included. The intervention group significantly increased their time spent walking at all follow-ups, with a difference at 13 months of 22 minutes (p<0.01) and 1645 steps per day (p<0.05), respectively, versus controls. Concomitantly, they decreased their MVPA with 13 minutes per day (p<0.001) at weekdays at 13 months versus baseline. We also found a decrease in LPA with 19 minutes per day (p<0.05), and of 17 minutes per day for MVPA (p<0.001) at 13 months versus baseline at weekends. The control group increased their time spent sitting with 25 minutes per day (p<0.05) and decreased the time spent standing with 35 minutes per day at weekdays (p<0.001) compared to baseline. There was also a decrease in LPA with 14 minutes per day (p<0.01) and in MVPA with 6 minutes per day (p<0.01) versus baseline during weekdays, with a decrease in sitting time with 36 minutes (p<0.05) at weekends. There were no significant changes in body measurements or body composition.

CONCLUSION: It is possible to increase daily walking time by introducing treadmill workstations at offices. A decreased MVPA within the intervention group may contribute to lack of effects on body measurements and body composition. It is therefore important that future interventions aim at both reducing sedentary time as well as increasing, or at least remaining, MVPA levels.

Place, publisher, year, edition, pages
Lippincott Williams & Wilkins, 2018
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
urn:nbn:se:umu:diva-156624 (URN)000456870500144 ()
Conference
Annual Meeting of the American-College-of-Sports-Medicine (ACSM), MAY 31, 2018, Minneapolis, MN
Note

Supplement: 1

Meeting Abstract: 256

Available from: 2019-02-20 Created: 2019-02-20 Last updated: 2019-02-20Bibliographically approved
Wadell, K., Wiklund, U., Öhberg, F., Bergmann, E., Holmner, Å. & Blomberg, A. (2018). Longitudinal, home-based study of lung function, saturation and disease-related symptoms in COPD. Paper presented at 28th International Congress of the European-Respiratory-Society (ERS), SEP 15-19, 2018, Paris, FRANCE. European Respiratory Journal, 52
Open this publication in new window or tab >>Longitudinal, home-based study of lung function, saturation and disease-related symptoms in COPD
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2018 (English)In: European Respiratory Journal, ISSN 0903-1936, E-ISSN 1399-3003, Vol. 52Article in journal, Meeting abstract (Other academic) Published
Abstract [en]

Background: Many telehealth (TH) systems have been designed to identify signs of COPD exacerbations, but few previous studies have reported the nature of recorded lung function data and what variations to expect in stable versus unstable patients.

Aims: To evaluate the nature of individual diurnal, day-to-day and long-term variation in important prognostic markers of COPD exacerbations in a heterogeneous patient group by employing a newly developed TH system.

Methods: Eight women and five men with COPD performed measurements (FEV1, IC, SpO2 and CAT) three times per week during 4-6 months using the TH system. Feasibility was based on the repeatability and quality of the FEV1 and IC measurements, as defined by ERS/ATS guidelines. Short-term and long-term individual variations were assessed using the relative density and mean (SD) respectively.

Results: Close to 1100 FEV1 and IC measurements respectively were performed during a total of 240 patient weeks. The 2SD ranges for intra-individual variation were ± 210 mL and ± 350 mL for FEV1 and IC respectively. The values both increased and decreased without corresponding influence on symptoms (CAT) or SpO2 and no exacerbation was reported. However, it was unusual with a decrease of more than 50 mL per measurement in FEV1 between three consecutive measurement days.

Conclusions: This study reveals important and, to our knowledge, previously not reported information about short and long-term variability in lung function measurements in stable patients with COPD, of significance when defining criteria for detecting exacerbations with TH systems.

Place, publisher, year, edition, pages
European Respiratory Society, 2018
National Category
Respiratory Medicine and Allergy
Identifiers
urn:nbn:se:umu:diva-155993 (URN)10.1183/13993003.congress-2018.PA3828 (DOI)000455567104471 ()
Conference
28th International Congress of the European-Respiratory-Society (ERS), SEP 15-19, 2018, Paris, FRANCE
Available from: 2019-02-07 Created: 2019-02-07 Last updated: 2019-02-07Bibliographically approved
Bergman, F., Wahlström, V., Stomby, A., Otten, J., Lanthén, E., Renklint, R., . . . Olsson, T. (2018). Treadmill workstations in office workers who are overweight or obese: a randomised controlled trial. The Lancet Public Health, 3(11), Article ID e523-e535.
Open this publication in new window or tab >>Treadmill workstations in office workers who are overweight or obese: a randomised controlled trial
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2018 (English)In: The Lancet Public Health, ISSN 2468-2667, Vol. 3, no 11, article id e523-e535Article in journal (Refereed) Published
Abstract [en]

Background: Treadmill workstations that enable office workers to walk on a treadmill while working at their computers might increase physical activity in offices, but long-term effects are unknown. We therefore investigated whether treadmill workstations in offices increased daily walking time.

Methods: We did a randomised controlled trial of healthy office workers who were either overweight or obese. We recruited participants from 13 different companies, which comprised 17 offices, in Umeå, Sweden. We included people who were aged 40-67 years, had sedentary work tasks, and had a body-mass index (BMI) between 25 kg/m2 and 40 kg/m2. After the baseline measurement, we stratified participants by their BMI (25-30 kg/m2 and >30 to 40 kg/m2); subsequently, an external statistician randomly assigned these participants (1:1) to either the intervention group (who received treadmill workstations for optional use) or the control group (who continued to work at their sit-stand desks as usual). Participants in the intervention group received reminders in boosting emails sent out to them at four occasions during the study period. Researchers were masked to group assignment until after analysis of the primary outcome. After the baseline measurement, participants were not masked to group belongings. The primary outcome was total daily walking time at weekdays and weekends, measured at baseline, 2 months, 6 months, 10 months, and 13 months with the accelerometer activPAL (PAL Technologies, Glasgow, UK), which was worn on the thigh of participants for 24 h a day for 7 consecutive days. We used an intention-to-treat approach for our analyses. This trial is registered with ClinicalTrials.gov, number NCT01997970, and is closed to new participants.

Findings: Between Nov 1, 2013, and June 30, 2014, a total of 80 participants were recruited and enrolled (n=40 in both the intervention and control groups). Daily walking time during total time awake at weekdays increased between baseline and 13 months by 18 min (95% CI 9 to 26) in the intervention group and 1 min (-7 to 9) in the control group (difference 22 min [95% CI 7 to 37], pinteraction=0·00045); for weekend walking, the change from baseline to 13 months was 5 min (-8 to 18) in the intervention group and 8 min (-5 to 21) in the control group (difference -1 min [-19 to 17]; pinteraction=0·00045). Neither measure met our predetermined primary outcome of 30 min difference in total walking time between the intervention and control group, so the primary outcome of the trial was not met. One adverse event was reported in a participant who accidently stepped on their Achilles tendon.

Interpretation: In a sedentary work environment, treadmill workstations result in a statistically significant but smaller-than-expected increase in daily walking time. Future studies need to investigate how increasing physical activity at work might have potentially compensatory effects on non-work activity.

Place, publisher, year, edition, pages
The Lancet Publishing Group, 2018
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Research subject
Public health
Identifiers
urn:nbn:se:umu:diva-152709 (URN)10.1016/S2468-2667(18)30163-4 (DOI)000451514600013 ()30322782 (PubMedID)
Available from: 2018-10-19 Created: 2018-10-19 Last updated: 2019-05-20Bibliographically approved
Rasouli, O., Fors, E. A., Borchgrevink, P. C., Öhberg, F. & Stensdotter, A.-K. (2017). Gross and fine motor function in fibromyalgia and chronic fatigue syndrome. Journal of Pain Research, 10, 303-309
Open this publication in new window or tab >>Gross and fine motor function in fibromyalgia and chronic fatigue syndrome
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2017 (English)In: Journal of Pain Research, ISSN 1178-7090, E-ISSN 1178-7090, Vol. 10, p. 303-309Article in journal (Refereed) Published
Abstract [en]

Purpose: This paper aimed to investigate motor proficiency in fine and gross motor function, with a focus on reaction time (RT) and movement skill, in patients with fibromyalgia (FM) and chronic fatigue syndrome (CFS) compared to healthy controls (HC). Methods: A total of 60 individuals (20 CFS, 20 FM, and 20 HC), age 19-49 years, participated in this study. Gross motor function in the lower extremity was assessed using a RT task during gait initiation in response to an auditory trigger. Fine motor function in the upper extremity was measured during a precision task (the Purdue Pegboard test) where the number of pins inserted within 30 s was counted. Results: No significant differences were found between FM and CFS in any parameters. FM and CFS groups had significantly longer RT than HC in the gait initiation (p=0.001, and p=0.004 respectively). In the Purdue Pegboard test, 20% in the FM group, 15% in the CFS groups, and 0% of HC group, scored below the threshold of the accepted performance. However, there were no significant differences between FM, CFS, and HC in this task (p=0.12). Conclusion: Compared to controls, both CFS and FM groups displayed significantly longer RT in the gait initiation task. Generally, FM patients showed the worst results in both tests, although no group differences were found in fine motor control, according to the Purdue Pegboard test.

Place, publisher, year, edition, pages
DOVE MEDICAL PRESS LTD, 2017
Keywords
fatigue syndrome, chronic, musculoskeletal diseases, gait initiation, Purdue Pegboard, reaction time
National Category
Physiotherapy
Identifiers
urn:nbn:se:umu:diva-132840 (URN)10.2147/JPR.S127038 (DOI)000395150900001 ()28223840 (PubMedID)
Available from: 2017-04-05 Created: 2017-04-05 Last updated: 2018-06-09Bibliographically approved
Ertzgaard, P., Öhberg, F., Gerdle, B. & Grip, H. (2016). A new way of assessing arm function in activity using kinematic Exposure Variation Analysis and portable inertial sensors - A validity study. Manual Therapy, 21, 241-249
Open this publication in new window or tab >>A new way of assessing arm function in activity using kinematic Exposure Variation Analysis and portable inertial sensors - A validity study
2016 (English)In: Manual Therapy, ISSN 1356-689X, E-ISSN 1532-2769, Vol. 21, p. 241-249Article in journal (Refereed) Published
Abstract [en]

Portable motion systems based on inertial motion sensors are promising methods, with the advantage compared to optoelectronic cameras of not being confined to a laboratory setting. A challenge is to develop relevant outcome measures for clinical use. The aim of this study was to characterize elbow and shoulder motion during functional tasks, using portable motion sensors and a modified Exposure Variation Analysis (EVA) and evaluate system accuracy with optoelectronic cameras. Ten healthy volunteers and one participant with sequel after stroke performed standardised functional arm tasks. Motion was registered simultaneously with a custom developed motion sensor system, including gyroscopes and accelerometers, and an optoelectronic camera system. The EVA was applied on elbow and shoulder joints, and angular and angular velocity EVA plots was calculated. The EVA showed characteristic patterns for each arm task in the healthy controls and a distinct difference between the affected and unaffected arm in the participant with sequel after stroke. The accuracy of the portable system was high with a systematic error ranging between -1.2 degrees and 2.0 degrees. The error was direction specific due to a drift component along the gravity vector. Portable motion sensor systems have high potential as clinical tools for evaluation of arm function. EVA effectively illustrates joint angle and joint angle velocity patterns that may capture deficiencies in arm function and movement quality. Next step will be to manage system drift by including magnetometers, to further develop clinically relevant outcome variables and apply this for relevant patient groups.

Keywords
Upper extremity motion analysis, Portable motion sensors, Exposure Variation Analysis, Validity
National Category
Medical Laboratory and Measurements Technologies Medical Engineering
Identifiers
urn:nbn:se:umu:diva-120666 (URN)10.1016/j.math.2015.09.004 (DOI)000373615100033 ()26456185 (PubMedID)
Available from: 2016-06-16 Created: 2016-05-18 Last updated: 2018-06-07Bibliographically approved
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