title: Erratum to: Validation of the Animated Activity Questionnaire (AAQ) for patients with hip and knee osteoarthritis: comparison to home-recorded videos.
authors.affiliation: Department of Epidemiology and Biostatistics and the EMGO Institute for Health and Care Research, VU University Medical Centre, De Boelenlaan 1089a, 1081 HV, Amsterdam, The Netherlands. w.peter@vumc.nl.|Amsterdam Rehabilitation Research Centre | Reade, Amsterdam, The Netherlands. w.peter@vumc.nl.
authors.forename: W F
authors.initials: WF
authors.lastname: Peter
authors.affiliation: Department of Epidemiology and Biostatistics and the EMGO Institute for Health and Care Research, VU University Medical Centre, De Boelenlaan 1089a, 1081 HV, Amsterdam, The Netherlands. mickloos@hotmail.com.
authors.forename: M
authors.initials: M
authors.lastname: Loos
authors.affiliation: Amsterdam Rehabilitation Research Centre | Reade, Amsterdam, The Netherlands. j.vd.hoek@reade.nl.
authors.forename: J
authors.initials: J
authors.lastname: van den Hoek
authors.affiliation: Department of Epidemiology and Biostatistics and the EMGO Institute for Health and Care Research, VU University Medical Centre, De Boelenlaan 1089a, 1081 HV, Amsterdam, The Netherlands. cb.terwee@vumc.nl.
authors.forename: C B
authors.initials: CB
authors.lastname: Terwee