1. Department of Medicine, Rochester General Hospital, Rochester, New York.
2. Division of Infectious Diseases, Department of Internal Medicine, College of Medicine, Hanyang University Hospital, Seoul, Korea.
3. Department of Internal Medicine, St. Vincent's Hospital, School of Medicine, The Catholic University of Korea, Suwon, Korea.
4. Department of Internal Medicine, Gil Hospital, Gacheon University, Incheon, Korea.
5. Department of Internal Medicine, Ajou University Hospital, Suwon, Korea.
6. Department of Internal Medicine, Jeju University Hospital, Jeju, Korea.
7. Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
8. Department of Internal Medicine, Hallym University Hospital, Seoul, Korea.
9. Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea.
10. Department of Internal Medicine, Donga University Hospital, Busan, Korea.
11. Department of Internal Medicine, Korea University Hospital, Seoul, Korea.
12. Department of Internal Medicine, Daejeon University Hospital, Daejeon, Korea.
13. Department of Internal Medicine, Korea University Hospital, Ansan, Korea.
14. Department of Internal Medicine, Gyemyeong University Hospital, Daegu, Korea.
15. Department of Internal Medicine, Inha University Hospital, Incheon, Korea.
16. Department of Family Medicine, Inje University Haeundae Paik Hospital, Busan, Korea.