1. Department of Plastic, Reconstructive and Hand Surgery, Center for Severe Burn Injuries, Klinikum Nürnberg, Paracelsus Medical University, Nuremberg, Germany
2. Department of Health Management, Friedrich Friedrich Alexander University Erlangen-Nuernberg (FAU), Erlangen, Germany
3. Department of General and Visceral Surgery, Hospital Martha-Maria, Nuremberg, Germany
4. Department of Orthopaedic and Trauma Surgery, Center of Plastic Surgery, Hand Surgery and Microsurgery, Evangelisches Waldkrankenhaus Spandau, Berlin, Germany.