1 Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Occupational and Environmental Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
2 School of Medicine, National Taiwan University College of Medicine, Taipei City, Taiwan.
3 Weill Cornell Medicine, New York, NY, United States.
4 Department of Occupational and Environmental Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; Department of Public Health, College of Health Science, Kaohsiung Medical University, Kaohsiung, Taiwan; The Deputy Minister, Ministry of Health and Welfare, Taiwan. Electronic address: hochikung@yahoo.com.