1. Division of Infectious Diseases, Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea.
2. Division of Infectious Diseases, Department of Internal Medicine, Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea.
3. Division of Infectious Diseases, Department of Internal Medicine, St. Vincent Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea.
4. Laboratory Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea.