Is a model of stratified exercise therapy by physical therapists in primary care feasible in patients with knee osteoarthritis? : a mixed methods study.
J. Knoop; M van der Leeden; M. van der Esch; M. de Rooij; W.F. Peter; K.L. Bennell; M.P.M. Steultjens; A. Hakkinen; L.D. Roorda; W.F. Lems; J Dekker