1. Plastic, Reconstructive, and Esthetic Surgery, RKH Hospital Bietigheim-Vaihingen, Bietigheim-Bissingen, Germany.
2. Department of Plastic and Esthetic Surgery, Hand Surgery, HELIOS Hospital Emil von Behring, Berlin, Germany.
3. Plastic Surgery, Hand Surgery, Burn Center, Cologne-Merheim Hospital, Witten/Herdecke University, Cologne, Germany.
4. Institute for Research in Operative Medicine (IFOM), Cologne-Merheim Medical Center, Witten/Herdecke University, Cologne, Germany.