1. Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
2. Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
3. Department of Hematology-Oncology, Ajou University School of Medicine, Suwon, Korea
4. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
5. Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu, Korea
6. Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea
7. Department of Hematology/Oncology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
8. Department of Internal Medicine, Chonbuk National University School of Medicine, Jeonju, Korea
9. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
10. Center for Hematologic Malignancies, National Cancer Center, Goyang, Korea
11. Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
12. Department of Hematology-Oncology, Konkuk University Medical Center, Seoul, Korea