Bibliographical noteFunding Information:
Conflict of Interest Disclosures: Drs Ostelo, Groenewegand, van Tulder, and Huygen reported receiving grants from The Netherlands Organisation for Health Research and Development during the conduct of the study. Dr Ostelo reported receiving grants from The Netherlands Organisation Scientific Research, Wetenschappelijk College Fysiotherapie/KNGF, Ned Ver Manuele Therapie, European Chiropractors’ Union, Amsterdam Movement Sciences, National Health Care Institute, and De Friesland Zorgverzekeraar outside the submitted work. No other disclosures were reported.
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