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