1. Infection Control Unit, Daejeon St. Mary’s Hospital, The Catholic University of Korea, Daejeon, Republic of Korea
2. The Catholic University of Korea, Daejeon, Republic of Korea
3. Division of Infectious Diseases, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
4. Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea