1. Department of Surgery, KUMC Thyroid CenterKorea University Hospital, Korea University College of Medicine Seoul Republic of Korea
2. Department of SurgerySeoul National University Hospital, Seoul National University College of Medicine Seoul Republic of Korea
3. Division of Endocrine Surgery, Department of Human Pathology in Adulthood and Childhood "G. Barresi"University Hospital “G. Martino”, University of Messina Messina Italy
4. Head and Neck Endocrine Surgery Division, Department of Otolaryngology—Head and Neck SurgeryThe Johns Hopkins University School of Medicine Baltimore Maryland USA