Affiliation: | 1. Deparment of Orthopaedic Surgery, Rijksunivseriteit Groningen, Universitair Medisch Centrum Groningen, the Netherlands;2. Department of Surgery and Perioperative Care, University of Texas at Austin, Dell Medical School, Austin, TX, USA;3. College of Education, University of Texas at Austin, Austin, TX, USA;4. The Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, UK |