1. Wrist Surgery Unit, Department of Orthopaedics, Claude Bernard Lyon University, Herriot Hospital, Lyon, France
2. Section of Hand Surgery, Sahlgrenska Hospital, Gothenburg, Sweden
3. Section of Hand Surgery, Aarhus University Hospital, Aarhus, Denmark
4. Hand Surgery Unit, Orthopaedic Department, Strasbourg University, Strasbourg, France
5. Hand Surgery Unit, Orthopaedic Department, Besançon University, Besançon, France
6. Technical University of Denmark, Lyngby, Denmark
7. Section of Hand Surgery, Gentofte Hospital/University of Copenhagen, Denmark