title: Authors' response.
authors: Kay M
authors: KM
authors: Crossley
authors: Joanne L
authors: JL
authors: Kemp
authors: Natalie J
authors: NJ
authors: Collins
authors: Ewa M
authors: EM
authors: Roos
mesh_terms: D001182:Arthroscopy; D006621:Hip Joint / Q000601:surgery*; D006801:Humans; D017063:Outcome Assessment, Health Care / Q000379:methods*