1. Department of Pediatrics, College of Medicine, Kaohsiung Chang-Gung Memorial Hospital and Chang-Gung University, Kaohsiung, Taiwan
2. Department of Healthcare Administration, I-Shou University, Kaohsiung, Taiwan
3. Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
4. National Institute of Environmental Health Sciences, National Health Research Institute, Miaoli, Taiwan