About the Authors

Tom P. C. Schlösser

Affiliation Department of Orthopaedic Surgery, University Medical Center Utrecht, Utrecht, the Netherlands

Geert J. M. G. van der Heijden

Affiliations Department of Epidemiology, University Medical Center Utrecht, Utrecht, the Netherlands, Department of Social Dentistry, Academic Center for Dentistry Amsterdam, VU Amsterdam University and University of Amsterdam, Amsterdam, the Netherlands

Anne L. Versteeg

Affiliation Department of Orthopaedic Surgery, University Medical Center Utrecht, Utrecht, the Netherlands

René M. Castelein

R.M.Castelein@umcutrecht.nl

Affiliation Department of Orthopaedic Surgery, University Medical Center Utrecht, Utrecht, the Netherlands

Competing Interests

The authors have read the journal’s policy and have the following conflicts: Alexandre Suerman MD/PhD programme and a Medtronic Research Grant (unrestricted). This does not alter the authors’ adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: TS GH RC. Performed the experiments: TS AV. Analyzed the data: TS AV GH RC. Contributed reagents/materials/analysis tools: TS GH. Wrote the paper: TS GH RC.