1. Department of Plastic and Reconstructive Surgery, Institute for Musculoskeletal Medicine, Westfälische Wilhelms-University, 48149 Münster, Germany
2. Department of Plastic Surgery, Department for Traumatology and Hand Surgery, University Hospital Münster, Albert-Schweitzer-Campus 1, 48149 Münster, Germany
3. Department of Plastic Surgery, Community Hospital Feldkirch, Carinagasse 47, 6800 Feldkirch, Austria
4. Department of Plastic Surgery, Agaplesion Markus Hospital, Wilhelm Epstein Str. 4, 60431 Frankfurt am Main, Germany