1. Department of Otolaryngology, Chung-Ho Memorial Hospital, Kaohsiung City, Taiwan
2. Department of Pathology, Chung-Ho Memorial Hospital, Kaohsiung City, Taiwan
3. Department of Otolaryngology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung City, Taiwan
4. Department of Otolaryngology, Faculty of Medicine, College of Medicine, Kaohsiung City, Taiwan