1. Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Hannover, Germany
2. Department of Aesthetic and Preventive Medicine, Ethianum Clinic for Plastic and Reconstructive Surgery, Heidelberg, Germany
3. Clinic for Plastic Surgery and Hand Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
4. Department of Plastic Surgery, Burn Center, BG University Clinic Bergmannsheil, Bochum, Germany