1. Department of Surgery, Division of Plastic Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
2. Department of Plastic and Hand Surgery, Klinikum Rechts der Isar, Technical University of Munich, Munich
3. Department of Plastic, Hand and Reconstructive Surgery, University Hospital Regensburg, Regensburg
4. Department of Otolaryngology, Head and Neck Surgery, Klinikum Rechts der Isar, Technical University of Munich, Munich, Germany
5. Department of Surgery, Division of Plastic Surgery, Yale School of Medicine, New Haven, CT