1. Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai
2. Division of Head and Neck Surgery, Department of Surgery, Hunan Provincial Tumor Hospital; Xiangya Medical School of Central South University; Changsha Hunan China
3. Department of Plastic and Reconstructive Surgery, Marche Polytechnic University Medical School; University Hospital of Ancona; Ancona
4. Plastic Reconstructive and Aesthetic Surgery Unit; Villa Salaria Clinic; Rome
5. Division of Plastic and Reconstructive Surgery; Duke University Medical Center; Durham North Carolina
6. Maxillofacial Surgery Unit; Hospital of Florence; Florence Italy
7. MD Anderson Cancer Center; Houston Texas U.S.A.