1. Department of Internal Medicine, Sanggye Paik Hospital Inje University College of Medicine Seoul South Korea
2. Department of Oncology, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea
3. Department of Internal Medicine Seoul National University College of Medicine and Seoul National University Hospital Seoul South Korea
4. Division of Hematology‐Oncology, Department of Medicine Samsung Medical Center, Sungkyunkwan University School of Medicine Seoul South Korea
5. Division of Medical Oncology, Department of Internal Medicine Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea Seoul South Korea
6. Division of Hematology‐Oncology, Department of Medicine Chung‐Ang University College of Medicine Seoul South Korea
7. Division of Hemato‐Oncology, Department of Internal Medicine Pusan National University School of Medicine Busan South Korea
8. Division of Hematology/Oncology, Department of Internal Medicine College of Medicine, Chungnam National University Daejeon South Korea
9. Division of Hematology‐Oncology, Department of Internal Medicine Korea University Guro Hospital, Korea University College of Medicine Seoul South Korea
10. Division of Hematology‐Oncology, Department of Internal Medicine Dankook University College of Medicine Cheonan South Korea
11. Department of Oncology/Hematology Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University Daegu South Korea
12. Department of Internal Medicine Dong‐A University College of Medicine Busan South Korea
13. Department of Hematology‐Oncology Ewha Womans University Medical Center Seoul South Korea
14. Department of Hematological Oncology Hallym University Sacred Heart Hospital, Hallym University College of Medicine Anyang‐si South Korea