1. Culver Academies, Culver, Indiana and Tufts University, Medford, Massachusetts, U.S.A.
2. Division of Gastroenterology, Cathay General Hospital, Taipei, R.O.C.
3. Department of Chinese Medicine, Chang-Geng Memorial Hospital, Taipei, R.O.C.
4. Medical Faculty, China Medical College, Taichung, R.O.C.
5. Hepatitis Research Center and National Taiwan University Hospital, Taipei, R.O.C.