1. Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
2. Department of Occupational and Environmental Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
3. School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
4. School of Medicine, National Taiwan University College of Medicine, Taipei City, Taiwan
5. Department of Public Health, College of Health Science, Kaohsiung Medical University, Kaohsiung, Taiwan
6. Department of Community Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan