1. Department of Laboratory Medicine, Ewha Womans University College of Medicine, Seoul, Korea.
2. Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
3. Department of Laboratory Medicine, Sanggye Paik Hospital, School of Medicine, Inje University, Seoul, Korea.
4. Infection Control Office, Inje University Sanggye Paik Hospital, Seoul, Korea.
5. Department of Laboratory Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea.
6. Department of Laboratory Medicine, Wonkwang University Hospital, Iksan, Korea.
7. Department of Laboratory Medicine, College of Medicine, Yeungnam University, Daegu, Korea.
8. Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea.
9. Department of Laboratory Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
10. Department of Laboratory Medicine, Dongguk University Ilsan Hospital, Goyang, Korea.
11. Department of Laboratory Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
12. Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea.
13. Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.