∗VU University Medical Center, Department of Epidemiology & Biostatistics and the Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
†Spine Clinic, Zaandam, The Netherlands
‡Amsterdam Rehabilitation Research Center, Reade, Amsterdam, The Netherlands
§Department of Health Science of the Faculty of Earth and Life Sciences, VU University, Amsterdam, The Netherlands
¶Department of General Practice and Elderly Care Medicine, Amsterdam Public Health Research Institute, VU University Medical Center, Amsterdam, The Netherlands.
Address correspondence and reprint requests to Wouter Schuller, MD, VU University Medical Center, Department of Epidemiology & Biostatistics and the Amsterdam Public Health Research Institute, P.O. box 7057, 1007 MB Amsterdam, The Netherlands; E-mail: [email protected]
Received 29 May, 2018
Revised 26 July, 2018
Accepted 3 August, 2018
The manuscript submitted does not contain information about medical device(s)/drug(s).
Our study was part of a larger research effort funded by the Dutch Association for Musculoskeletal Medicine.
Relevant financial activities outside the submitted work: board membership, grants.
