1. Istitute of Public Health, Taipei, Taiwan, Republic of China
2. AIDS Prevention and Research Center, Taipei, Taiwan, Republic of China
3. Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan, Republic of China
4. Division of Clinical Virology, Department of Pathology and Laboratory Medicine, Taipei, Taiwan, Republic of China
5. Department of Respiratory Therapy, Taipei, Taiwan, Republic of China
6. Section of Biochemistry, Department of Pathology and Laboratory Medicine, Veterans General Hospital, Taipei, Taiwan, Republic of China
7. Institute of Microbiology and Immunology, Taipei, Taiwan, Republic of China
8. Faculty of Life Science, National Yang-Ming University, Taipei, Taiwan, Republic of China