1. Department of Public Health, College of Health Sciences, Kaohsiung, Medical University, Kaohsiung, Taiwan
2. Master program in Aging and Long-term Care, College of Nursing, Kaohsiung Medical University, Kaohsiung, Taiwan
3. Faculty 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