1. Department of Plastic, Reconstructive and Aesthetic Surgery, RKH Hospital Bietigheim-Vaihingen, Bietigheim-Bissingen, Germany.
2. Department of Plastic and Aesthetic Surgery, Hand Surgery, HELIOS Hospital Emil von Behring, Berlin, Berlin, Germany.
3. Department of 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.