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