1. a Department of Pharmacology, College of Health Sciences , Kaohsiung Medical University , Kaohsiung
2. b Department of Healthcare Administration , I-Shou University , Kaohsiung
3. c Department of Public Health, College of Health Sciences , Kaohsiung Medical University , Kaohsiung
4. d Division of Environmental Health and Occupational Medicine , National Health Research Institute , Miaoli
5. e Graduate Institute of Public Health , China Medical University , Taichung, Taiwan