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