1. Department of Hand and Plastic Surgery, Thurgau Hospital Group, 8500 Frauenfeld, Switzerland
2. Division of Plastic, Aesthetic and Reconstructive Surgery, Medical University of Graz, 8010 Graz, Austria
3. Department of Plastic and Hand Surgery, Inselspital, University Hospital Bern, 3010 Bern, Switzerland
4. Department of Plastic, Reconstructive and Aesthetic Surgery, Ospedale Regionale di Lugano, Ente Ospedaliero Cantonale (EOC), 6900 Lugano, Switzerland
5. Division of Hand, Plastic and Aesthetic Surgery, University Hospital LMU Munich, 80339 Munich, Germany