1. Hepatobiliary Division, Department of Internal Medicine, Kaohsiung Medical University Hospital; Kaohsiung Medical University; Kaohsiung Taiwan
2. Faculty of Internal Medicine, School of Medicine, College of Medicine; Kaohsiung Medical University; Kaohsiung Taiwan
3. Department of Occupational Medicine, Kaohsiung Medical University Hospital; Kaohsiung Medical University; Kaohsiung Taiwan
4. Department of Preventive Medicine, Kaohsiung Medical University Hospital; Kaohsiung Medical University; Kaohsiung Taiwan
5. Institute of Biomedical Sciences; National Sun Yat-Sen University; Kaohsiung Taiwan
6. Liver Center, Division of Gastroenterology, Massachusetts General Hospital; Harvard Medical School; Boston Massachusetts USA