1. Department of Otorhinolaryngology‐Head and Neck Surgery Lo Sheng Sanatorium and Hospital Ministry of health and Welfare Taipei Taiwan
2. Graduate Institute of Clinical Medical Sciences, College of Medicine Chang Gung University Taoyuan Taiwan
3. Faculty of Medicine, College of Medicine Chang Gung University Taoyuan Taiwan
4. Health Information and Epidemiology Laboratory of Chang Gung Memorial Hospital Chia‐Yi Taiwan
5. Department of Otolaryngology Chang Gung Memorial Hospital Chiayi Taiwan
6. Department of Traditional Chinese Medicine Chang Gung Memorial Hospital Chiayi Taiwan
7. School of Traditional Chinese Medicine, College of Medicine Chang Gung University Taoyuan Taiwan