1. Department of Internal Meidicine, Yonsei University College of Medicine, Korea.
2. Department of Pediatrics, Hwasun Hospital, Chonnam National University Medical School, Korea.
3. Department of Internal Medicine, Bundang Hospital, Seoul National University College of Medicine, Korea.
4. Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Korea.
5. Department of Internal Medicine, Busan Paik Hospital, College of Medicine, Inje University, Korea.
6. Department of Internal Medicine, Seoul National University College of Medicine, Korea.
7. Department of Hematology-Oncology, Hwasun Hospital, Chonnam National University Medical School, Korea.
8. Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Korea.
9. Pediatric Oncology Branch, Specific Organs Cancer Center, National Cancer Center, Korea.
10. Department of Internal Medicine, Sungkyunkwan University School of Medicine, Korea.
11. Department of Internal Medicine, Soonchunhyang University College of Medicine, Korea.
12. Department of Internal Medicine, Konkuk University College of Medicine, Korea.
13. Department of Internal Medicine, Chungnam National University College of Medicine, Korea.
14. Department of Pediatrics, St. Mary's Hospital, The Catholic University of Korea College of Medicine, Korea.
15. Department of Laboratory Medicine, St. Mary's Hospital, The Catholic University of Korea College of Medicine, Korea.
16. Department of Laboratory Medicine, Sungkyunkwan University School of Medicine, Korea.