1. Department of Hand, Plastic and Reconstructive Surgery, Burn Center, BG Trauma Center Ludwigshafen, 67071 Ludwigshafen am Rhein, Germany
2. Department of Surgery, University of Texas Medical Branch, Galveston, TX 77555, USA
3. Department of Otorhinolaryngology, Head and Neck Surgery, Armed Forces Hospital Ulm, 89081 Ulm, Germany
4. Department of Plastic, Hand and Reconstructive Microsurgery, Hand Trauma and Replantation Center (FESSH), BG Klinik Frankfurt am Main gGmbH, Academic Teaching Hospital of Goethe-University of Frankfurt, 60629 Frankfurt am Main, Germany