1. Department of Pathology and Laboratory Medicine; Institute of Medical Science; The University of Tokyo; Shirokanedai 4-6-1 Minato-ku Tokyo 108-8639 Japan
2. Department of Pathology; Tokyo Metropolitan Komagome Hospital; Honkomagome 3-18-22 Bunkyo-ku Tokyo 113-8677 Japan
3. Department of Pathology; National Center for Global Health and Medicine Hospital; 1-21-1 Toyama Shinjuku-ku Tokyo 162-8655 Japan
4. Department of Pathology; Kyorin University School of Medicine; 6-20-2 Shinkawa Mitaka City Tokyo 181-8611 Japan
5. Department of Pathology; Osaka National Hospital; 2-1-14 Hoenzaka Chuo-ku Osaka 540-0006 Japan
6. Department of Pathology; Nagoya Medical Center; 4-1-1 Sannomaru Nakaku Nagoya 460-0001 Japan
7. Department of Pathology; National Institute of Infectious Diseases; 1-23-1 Toyama Shinjuku-ku Tokyo 162-8640 Japan
8. Department of Infectious Diseases; Tokyo Metropolitan Komagome Hospital; Honkomagome 3-18-22 Bunkyo-ku Tokyo 113-8677 Japan
9. AIDS Clinical Center; National Center for Global Health and Medicine Hospital; 1-21-1 Toyama Shinjuku-ku Tokyo 162-8655 Japan
10. Department of Infectious Diseases; Osaka National Hospital; 2-1-14 Hoenzaka Chuo-ku Osaka 540-0006 Japan
11. Department of Hematology; National Center for Global Health and Medicine Hospital; 1-21-1 Toyama Shinjuku-ku Tokyo 162-8655 Japan
12. Department of Hematology; Clinical Research Center; Nagoya Medical Center; 4-1-1 Sannomaru Nakaku Nagoya 460-0001 Japan
13. Department of Infectious Diseases and Immunology; Clinical Research Center; Nagoya Medical Center; 4-1-1 Sannomaru Nakaku Nagoya 460-0001 Japan
14. Department of Infectious Diseases; Institute of Medical Science; The University of Tokyo; Shirokanedai 4-6-1 Minato-ku Tokyo 108-8639 Japan
15. Center for AIDS Research; Kumamoto University; Kumamoto 860-0811 Japan