Yen-Liang Chang1, Po-Yueh Chen2, Shih-Han Hung3. 1. Department of Otolaryngology Head and Neck Surgery, Cathay General Hospital, Taipei, Taiwan; School of Medicine, Fu Jen Catholic University, Taipei, Taiwan. 2. Department of Otolaryngology Head and Neck Surgery, Taipei Medical University-Shuang Ho Hospital, Taipei, Taiwan. 3. Department of Otolaryngology, Taipei Medical University Hospital, Taipei, Taiwan; Department of Otolaryngology, School of Medicine, Taipei Medical University, Taipei, Taiwan. Electronic address: seedturtle@gmail.com.