1. Graduate Institute of Life Sciences
2. Department of Internal Medicine, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
3. Department of Medicine
4. Department of Pathology
5. Department of Internal Medicine
6. Department of Surgery,
7. Department of Microbiology and Immunology, National Yang-Ming University, Taipei 112, Taiwan
8. Department of Microbiology and Immunology, National Defense Medical Center, Taipei 114, Taiwan