1. Institute of Epidemiology and Preventive Medicine; College of Public Health, National Taiwan University; Taipei Taiwan
2. Department of Otolaryngology-Head and Neck Surgery; Taipei Tzu Chi General Hospital, Buddhist Tzu Chi Medical Foundation; New Taipei City Taiwan
3. School of Medicine; Tzu Chi University; Hualien Taiwan
4. School of Oral Hygiene; College of Oral Medicine, Taipei Medical University; Taipei Taiwan
5. Department of Otolaryngology; College of Medicine, National Taiwan University; Taipei Taiwan
6. Department and Graduate Institute of Health Care Management; Kainan University; Tao-Yuan Taiwan
7. Department and Graduate Institute of Health Care Management; Chang Gung University; Tao-Yuan Taiwan
8. Department of Internal Medicine, College of Medicine; National Taiwan University; Taipei Taiwan
9. Cancer Research Center, Changhua Christian Hospital; Changhua Taiwan
10. Health Promotion Administration, Ministry of Health and Welfare; Taipei Taiwan
11. Department of Otolaryngology-Head and Neck Surgery; Changhua Christian Hospital; Changhua Taiwan
12. Institute of Public Health; National Yang-Ming University; Taipei Taiwan