1. Institute of Occupational Medicine and Industrial Hygiene; National Taiwan University (NTU); Taipei Taiwan
2. Department of Environmental and Occupational Medicine, NTU College of Medicine and NTU Hospital; Taipei Taiwan
3. Hepatobiliary Division, Department of Internal Medicine and Hepatitis Center; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
4. Clinical and Research Center for Yusho and Dioxin; Kyushu University; Fukuoka Japan
5. Department of Health Care Administration and Management; Kyushu University Graduate School of Medical Sciences; Fukuoka Japan
6. Department of Food and Health Sciences; Fukuoka Women's University; Fukuoka Japan