1. Department of Internal Medicine, Institute of Health Sciences; Gyeongsang National University; 15 Jinju-daero 816 beon-gil Jinju 52727 Republic of Korea
2. Divsion of Hematology and Oncology, Department of Internal Medicine; Soonchunhyang University Hospital Cheonan; Cheonan 31151 Republic of Korea
3. Department of Internal Medicine; Dong-A University Hospital; Busan 49201 Republic of Korea
4. Department of Internal Medicine; Kangwon National University School of Medicine; Chuncheon 24289 Republic of Korea
5. Divsion of Hematology and Oncology, Department of Internal Medicine; Soonchunhyang University Hospital Seoul; Seoul 04401 Republic of Korea
6. Department of Internal Medicine; Ewha Womans University, College of Medicine; Seoul 07985 Republic of Korea
7. Department of Internal Medicine; Dankook University Hospital; Cheonan 31116 Republic of Korea
8. Department of Internal Medicine; Chung-Ang University, College of Medicine; Seoul 06973 Republic of Korea
9. Division of Hematology and Medical Oncology, Department of Internal Medicine; Korea Cancer Hospital; Seoul 01812 Republic of Korea
10. Department of Hematology-Oncology; Ajou University Hospital; Suwon 16499 Republic of Korea