1. Division of Thyroid and Parathyroid Surgery; Department of Otolaryngology; Massachusetts Eye and Ear Infirmary and Harvard Medical School; Boston Massachusetts U.S.A.
2. Department of Otorhinolaryngology-Head and Neck Surgery; Kaohsiung Medical University Hospital; Faculty of Medicine, College of Medicine, Kaohsiung Medical University; Kaohsiung Taiwan
3. Department of Surgery; Massachusetts General Hospital and Harvard Medical School; Boston Massachusetts U.S.A.
4. Department of Surgical Sciences and Human Morphology; Division of Surgery; University of Insubria-School of Medicine; Varese Italy
5. Department of Endocrine Surgery; Jagiellonian University Medical College; Krakow Poland
6. Department of General; Visceral, and Vascular Surgery, Martin Luther University Halle-Wittenberg; Halle (Saale) Germany
7. Division of Surgical Oncology; Department of Surgery; Massachusetts General Hospital and Harvard Medical School; Boston Massachusetts U.S.A.