1. From the Department of Rehabilitation Sciences, Faculty of Kinesiology and Rehabilitation Sciences, Katholieke Universiteit Leuven, Belgium (L.D.W., I.B., W.D.W., H.F.); Department of Medical Sociology and Health Sciences, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Belgium (K.P., M.L., F.L.); Department of Rehabilitation Sciences, City Hospital NHS Trust, Nottingham, United Kingdom (P.B.); University Hospital Pellenberg, Belgium (H.B., E.D.); Biostatistical Centre, Katholieke...