1. Department of Otorhinolaryngology-Head and Neck Surgery, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chia-Yi, Taiwan
2. Clinical Research Center, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chia-Yi, Taiwan
3. Department of Otorhinolaryngology-Head and Neck Surgery, Lo-sheng Sanatorium and Hospital Ministry of Health and Welfare, New Taipei City, Taiwan
4. Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan