1. Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
2. Department of Internal Medicine, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon, Korea
3. Department of Hematology-Oncology, National Health Insurance Service Ilsan Hospital, Goyang, Gyeongki-do, Korea
4. Department of Internal Medicine, St. Vincent's Hospital, the Catholic University of Korea, Seoul, Korea
5. Department of Internal Medicine, Chonbuk National University Medical School & Hospital, Jeonju, South Korea
6. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
7. Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
8. Department of Internal Medicine, Inje University College of Medicine, Inje University Busan Paik Hospital, Gaegumdong, Busanjingu, Busan, Republic of Korea
9. Division of Hematology-Oncology, Department of Medicine, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
10. Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
11. Hematology-Oncology Clinic, National Cancer Center, Goyang-city, Korea
12. Department of Internal Medicine, Korea University Anam Hospital, College of Medicine, Seoul, Korea
13. Department of Internal Medicine, Soon Chun Hyang University, Seoul, Korea
14. Department of Internal Medicine, Ewha Womans University, Seoul, Korea
15. Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Chucheon, Korea
16. Department of Internal Medicine, Kangdong Sacred Heart Hospital, Seoul, Korea
17. Division of Hematology-Oncology, Department of Medicine, Wonju Severance Christian Hospital, Yonsei University College of Medicine, Wonju, Korea
18. Department of Internal Medicine, Dong-A University Hospital, Busan, Korea
19. Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Korea
20. Department of Internal Medicine, Daegu Catholic University Medical Center, Catholic University of Daegu School of Medicine, Daegu, Korea
21. Department of Hemato-oncology, Chonnam National University Hwasun Hospital, Jeollanamdo, Korea
22. Department of Internal Medicine, Seoul Medical Center, Seoul, Korea
23. Department of Internal Medicine, Kosin University Gospel Hospital, Busan, Korea
24. Department of Hemato-oncology, Chungnam National University Hospital, Daejeon, Korea
25. Department of Internal Medicine, Dankook University College of Medicine, Cheonan, Korea
26. Department of Medicine, Yeungnam University College of Medicine, Daegu, Korea
27. Department of Internal Medicine, Chung Ang University, Seoul, Korea