1. Department of Hand, Plastic and Reconstructive Surgery, Microsurgery, Burn Center, BG Trauma Center Ludwigshafen, Hand and Plastic Surgery University of Heidelberg Ludwigshafen Germany
2. Institute of Medical Biometry and Informatics University of Heidelberg Heidelberg Germany
3. Department of Surgery, Division of Plastic Surgery, Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA