1. Department of Healthcare Administration, I-Shou University, Kaohsiung, Taiwan
2. Department of Management, Kaohsiung Municipal Cijin Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
3. Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
4. Division of Environmental Health and Occupational Medicine, National Health Research Institute, Miaoli, Taiwan