1. Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
2. Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
3. Department of Internal Medicine, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung, Taiwan
4. Faculty of Medicine, Department of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
5. Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan
6. Department of Family Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
7. Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan