1. Department of Hand Surgery, Schulthess Klinik, Zurich, Switzerland
2. Department of Hand and Wrist Surgery, AZ Monica Hospital, Antwerp, Belgium
3. Hand & Wrist Unit, Vall d'Hebron Hospital and Institut Kaplan, Barcelona, Spain
4. Department of Trauma, Orthopaedic and Plastic Surgery, Salford Royal NHS Foundation Trust, Manchester, UK
5. Radboud University Medical Centre, Nijmegen, The Netherlands
6. Jeroen Bosch Hospital‘s, Hertogenbosch, The Netherlands