[1] Nij Smellinghe Hosp, Dept Physiotherapy, NL-9202 NN Drachten, Netherlands
[2] TNO, Hlth Life, Leiden, Netherlands
[3] Nij Smellinghe Hosp Drachten, Dept Orthoped & Traumatol, NL-9202 NN Drachten, Netherlands
[4] Vrije Univ Amsterdam, Ctr Biostat, Amsterdam, Netherlands
[5] Diakonessenhuis Hosp Utrecht, Dept Physiotherapy, Utrecht, Netherlands
[6] Maastricht Univ, Med Ctr, Dept Epidemiol, NL-6200 MD Maastricht, Netherlands
[7] CAPHRI Sch Publ Hlth & Primary Care, Maastricht, Netherlands
[8] Ctr Care Technol Res, Maastricht, Netherlands