1. International Thyroid Surgery Center, Department of Otolaryngology-Head and Neck Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
2. Department of Otorhinolaryngology-Head and Neck Surgery, Kaohsiung Municipal Siaogang Hospital, Faculty of Medicine, College of Medicine, and Cohort Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan