1Hematology-Oncology, Soonchunhyang University Hospital, Seoul, South Korea
2Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
3Division of Hematology–Oncology, Department of Medicine, Samsung Medical Center Sungkyunkwan University School of Medicine, Seoul, South Korea
4Department of Hematology/Oncology, Kyungpook National University Hospital, Daegu, South Korea
5Hematology-Oncology, Chonnam National University Medical School, Gwangju, South Korea
6Internal Medicine, Yonsei University Severance Hospital, Seoul, South Korea
7Hematology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
8Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea