1. Division of Allergy, Immunology, and Rheumatology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
2. Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
3. Department of Family Medicine, Zuoying Branch of Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan.
4. Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
5. Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.
6. Graduate Institute of Pharmaceutical Technology, Tajen University, Pingtung, Taiwan.
7. Department of Virology III, National Institute of Infectious Diseases, Tokyo, Japan.
8. Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan.