[1] Radboud Univ Nijmegen, Med Ctr, Sci Inst Qual Hlth Care, Geert Grootepl 21, NL-6525 EX Nijmegen, Netherlands
[2] Vrije Univ Amsterdam, Dept Hlth Sci, Fac Earth & Life Sci, Amsterdam Publ Hlth Res Inst, De Boelelaan 1085, NL-1081 HV Amsterdam, Netherlands
[3] Univ Appl Sci, Avans, Heerbaan 14-40, NL-4817 NL Breda, Netherlands
[4] Univ Cape Town, Dept Hlth & Rehabil Sci, Anzio Rd, ZA-7935 Cape Town, South Africa
[5] Vrije Univ Amsterdam, Med Ctr, Dept Epidemiol & Biostat, Amsterdam, Netherlands
[6] Vrije Univ Amsterdam, Med Ctr, EMGO Inst Hlth & Care Res, Amsterdam, Netherlands
[7] Vrije Univ Brussel, Fac Med & Pharm, Dept Manual Therapy, Brussels, Belgium