About the Authors
- Ann M. Hepping
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* E-mail: a.m.hepping@umcg.nl
Affiliation Department of Rehabilitation Medicine, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
- Joris J. W. Ploegmakers
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Affiliation Department of Orthopedics, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
- Jan H. B. Geertzen
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Affiliation Department of Rehabilitation Medicine, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
- Sjoerd K. Bulstra
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Affiliation Department of Orthopedics, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
- Martin Stevens
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Affiliation Department of Orthopedics, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: AH JP. Performed the experiments: AH. Analyzed the data: AH JP JG SB MS. Contributed reagents/materials/analysis tools: AH JP JG SB MS. Wrote the paper: AH JP JG SB MS.