1 Department of Orthopedic Surgery, New York University, New York, NY , USA. margareta.nordin@nyu.edu.
2 HFR Fribourg-hôpital cantonal, Fribourg and Faculty of Medicine, University of Geneva, Geneva, Swizterland.
3 Centre for Applied Psychological and Health Research, University of Huddersfield, Huddersfield, UK.
4 Division of Clinical Pharmacology and Toxicology, Multidisciplinary Pain Centre & Division of General Medical Rehabilitation, Geneva University Hospitals and University of Geneva, Geneva, Switzerland.
5 Canada Research Chair, in Disability Prevention and Rehabilitation and Faculty of Health, Sciences, University of Ontario Institute of Technology (UOIT), Toronto, ON, Canada.
6 Department of Orthopaedics, University of Gothenburg, Sahlgrenska University Hospital, Gothenburg, Sweden.
7 Univ. Bordeaux, ISPED, Centre INSERM U897-Epidemiologie-Biostatistique, 33000, Bordeaux, France.
8 INSERM, ISPED, Centre INSERM U897-Epidemiologie-Biostatistique, 33000, Bordeaux, France.
9 CHU de Bordeaux, Pole de sante publique, Service d'information medicale, 33000, Bordeaux, France.
10 Department of Orthopedic and Trauma Surgery, Iris South Hospitals, Université Libre de Bruxelles, Brussels, Belgium.