1. Department of Laboratory Medicine, Incehon St. Mary's Hospital, The Catholic University School of Medicine, Incheon, Korea.
2. Department of Laboratory Medicine, Seoul St. Mary's Hospital, The Catholic University School of Medicine, Seoul, Korea.
3. Department of Laboratory Medicine, Uijeongbu St. Mary's Hospital, The Catholic University School of Medicine, Uijeongbu, Korea.
4. Department of Laboratory Medicine, St. Vincent's Hospital, The Catholic University School of Medicine, Suwon, Korea.
5. Department of Laboratory Medicine, Daejeon St. Mary's Hospital, The Catholic University School of Medicine, Daejeon, Korea.
6. Department of Laboratory Medicine, Yeouido St. Mary's Hospital, The Catholic University School of Medicine, Seoul, Korea.