1. Department of Internal Medicine, Kyungpook National University, Daegu, Korea.
2. Division of Infectious Diseases, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3. Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
4. Division of AIDS, Korea Centers for Disease Control and Prevention, Cheongju, Korea.
5. Institute for Health and Society, Hanyang University, Seoul, Korea.
6. Department of Preventive Medicine, Hanyang University College of Medicine, Seoul, Korea.
7. Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
8. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
9. AIDS Research Institute, Yonsei University College of Medicine, Seoul, Korea.
10. Department of Infectious Diseases, Ajou University School of Medicine, Suwon, Korea.
11. Department of Internal Medicine, Inha University School of Medicine, Incheon, Korea.