1. Department of Hematology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
2. Divison of Hematology and Medical Oncology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.
3. Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
4. Divison of Hematology, Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea.
5. Divison of Hematology-Oncology, Department of Internal Medicine, Korea University Guro Hospital, Seoul, Korea.
6. Department of Internal Medicine, Daegu Catholic University School of Medicine, Daegu, Korea.
7. Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea.
8. Division of Hematology-Oncology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, Korea.
9. Divison of Hematology, Department of Internal Medicine, Konkuk University Medical Center, Konkuk University, Seoul, Korea.