1. Institute of Public Health, Chung Shan Medical University, Taiwan
2. Department of Community Health Services, Tungs’ Taichung MetroHarbor Hospital, Taiwan
3. Department of Otolaryngology, Tungs’ Taichung MetroHarbor Hospital, Taiwan
4. Department of Life Sciences, National Chung Hsin University, Taiwan
5. Department of Family Medicine, Tungs’ Taichung MetroHarbor, Hospital, Taiwan
6. Department of Medical Research, Tungs’ Taichung MetroHarbor Hospital, Taiwan
7. Department of Occupational Medicine, Chung Shan Medical University Hospital, Taiwan