1. Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea.
2. Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
3. Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
4. Division of Infectious Diseases, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
5. Division of AIDS, Korea Centers for Disease Control and Prevention, Cheongju, Korea.
6. Institute for Health and Society, Hanyang University, Seoul, Korea.
7. Department of Preventive Medicine, Hanyang 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 Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
11. Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.