1. Clinic of Plastic and Aesthetic Surgery, Helios Hospital Berlin-Buch, Schwanebecker Chaussee 50, 13125 Berlin, Germany
2. Clinic for Plastic and Reconstructive Surgery, Handsurgery, Burn Care Center, University Witten/Herdecke, Cologne-Merheim Medical Center, Ostmerheimer Straße 200, 51109 Cologne, Germany
3. Clinic of Plastic, Reconstructive and Aesthetic Surgery, Helios Dr. Horst Schmidt Hospital Wiesbaden, Ludwig-Erhard-Straße 100, 65199 Wiesbaden, Germany