1 Department of Sports Science and Clinical Biomechanics, Research Unit for Musculoskeletal Function and Physiotherapy, University of Southern Denmark, 5230 Odense, Denmark; Centre for Evidence-Based Practice, Bergen University College, Bergen, Norway. Electronic address: hlund@health.sdu.dk.
2 Department of Sports Science and Clinical Biomechanics, Research Unit for Musculoskeletal Function and Physiotherapy, University of Southern Denmark, 5230 Odense, Denmark; Department of Rehabilitation, Herlev and Gentofte Hospital, Copenhagen, Denmark.
3 Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark.