1. Department of Surgery; Seoul Metropolitan Government - Seoul National University Boramae Medical Center; Seoul Korea
2. Department of Surgery, Korea University College of Medicine Thyroid Center, Korea University Hospital; Korea University College of Medicine; Seoul Korea
3. Division of Oral and Maxillofacial Surgery, Department of Dentistry; Korea University Anam Hospital; Seoul Korea
4. Division for Endocrine and Minimally Invasive Surgery, Department of Human Pathology in Adulthood and Childhood “G. Barresi”, University Hospital “G. Martino”; University of Messina; Italy
5. Minimally Invasive and Endocrine Surgery Division, Department of Surgery; Police General Hospital; Bangkok Thailand
6. Department of Otolaryngology; Massachusetts Eye and Ear Infirmary, Harvard Medical School; Boston Massachusetts
7. Department of Otolaryngology - Head and Neck Surgery; The Johns Hopkins University School of Medicine; Baltimore Maryland