1. Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Department of Hematology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
3. Division of Hematology-Oncology, Seoul National University College of Medicine, Seoul, Korea.
4. Division of Hematology-Oncology, Chungnam National University School of Medicine, Daejeon, Korea.
5. Division of Hematology-Oncology, Chonnam National University Medical School, Gwangju, Korea.
6. Division of Hematology-Oncology, Pusan National University Hospital, Busan, Korea.
7. Division of Hematology, Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea.