1. Department of Plastic, Hand- and Reconstructive Surgery; Hannover Medical School; 30625; Hannover; Germany
2. Department of Plastic Surgery and Handsurgery; Klinikum rechts der Isar; Technische Universität, München; 81675 Munich; Germany
3. Department for Trauma Surgery and Orthopedics; Regio Klinikum Pinneberg; 25421 Pinneberg; Germany