1. Division of Infectious Diseases, Department of Internal Medicine, Ajou University College of Medicine, Suwon, Korea.
2. Division of Infectious Diseases, Department of Internal Medicine, Seoul Medical Center, Seoul, Korea.
3. Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University College of Medicine, Seoul, Korea.
4. Department of Internal Medicine, St. Vincent’s Hospital, The Catholic University College of Medicine, Suwon, Korea.
5. Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
6. Division of Infectious Diseases, Department of Internal Medicine, Ewha Womans University School of Medicine, Seoul, Korea.
7. Division of Infectious Diseases, Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea.
8. Department of Preventive Medicine, Hanyang University College of Medicine, Seoul, Korea.
9. Division of AIDS, Korea Centers for Disease Control and Prevention, Cheongju, Korea.
10. Division of Infectious Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.