1. Division of Environmental Health and Occupational Medicine, National Health Research Institutes, Miaoli, Taiwan
2. Institute of Environmental Medicine, College of Public Health, China Medical University Hospital, Taichung, Taiwan
3. Department of Basic Medical Sciences, National Cheng-Kung University Medical College, Tainan, Taiwan
4. Department of Health Business Administration, Hung-Kuang University, Taichung, Taiwan
5. Department of Environmental and Occupational Medicine, National Taiwan University College of Medicine, and National Taiwan University Hospital, Taipei, Taiwan