1. Department of Orthopaedic and Trauma Surgery, Caritas-Krankenhaus, Bad Mergentheim, Germany
2. Department for Plastic Surgery and Hand Surgery, Technische Universität München, München, Germany
3. Clinic for Hand Surgery, Rhön-Klinikum AG, Bad Neustadt/Saale, Germany
4. Department of Hand Surgery, Vulpius Clinic, Bad Rappenau, Germany