1. Department of Hand, Plastic and Reconstructive Surgery, Burn Center, BG Trauma Center Ludwigshafen University of Heidelberg Heidelberg Germany
2. Department of General, Visceral and Transplantation Surgery University of Heidelberg Heidelberg Germany
3. Department of Regenerative Musculoskeletal Medicine, Institute of Musculoskeletal Medicine Westfaelische Wilhelms University Muenster Muenster Germany
4. Department of Plastic and Breast Surgery Zealand University Hospital Roskilde Denmark