1. Department of Internal Medicine, Division of Hematology/Oncology, Hanyang University College of Medicine, Seoul, Korea;
2. Department of Medicine, Division of Hematology/Oncology, Samsung Medical Center, Sungkyunkwan, University School of Medicine, Seoul, Korea;
3. Department of Oncology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea;
4. Department of Hemato-Oncology, Chonnam National University Hwasun Hospital, Gwangju, Korea;
5. Department of Internal Medicine, Division of Hematology, Inje University Busan Paik Hospital, Busan, Korea;
6. Department of Medicine, Division of Hematology-Oncology, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, South Korea;
7. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea;
8. Department of Internal Medicine, Soon Chun Hyang University, Seoul, South Korea;
9. Department of Medicine, Yeungnam University College of Medicine, Daegu, Korea;
10. Department of Hematology and Oncology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea;
11. Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea;
12. Department of Internal Medicine, Division of Hematology, St. Vincent’s Hospital, Catholic University of Korea College of Medicine, Suwon, Korea;
13. Department of Pathology, Hanyang University College of Medicine, Seoul, Korea;
14. Department of Pathology, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea