1. Centre of Plastic, Aesthetic, Hand and Reconstructive Surgery University of Regensburg Regensburg Germany
2. Department of Plastic and Esthetic Surgery, Hand Surgery Helios Hospital Emil von Behring Berlin Germany
3. Division of Hand, Plastic and Aesthetic Surgery University Hospital Munich Germany
4. Department of Hand, Plastic and Reconstructive Surgery, Burn Center BG Trauma Center Ludwigshafen Ludwigshafen Germany
5. Hand and Plastic Surgery University of Heidelberg Heidelberg Germany
6. Department of Plastic, Reconstructive, Esthetic and Handsurgery ETHIANUM Klinik Heidelberg Heidelberg Germany
7. Center for Clinical Studies University Medical Center Regensburg Regensburg Germany