1. Department of Internal Medicine; Chungbuk National University Hospital; Cheongju Korea
2. Department of Internal Medicine; Seoul St. Mary's Hospital; The Catholic University of Korea; Korea
3. Department of Internal Medicine; Samsung Medical Center; Sungkyunkwan University School of Medicine; Korea
4. Departments of Hematology-Oncology; School of Medicine; Kyung Hee University; Seoul Korea
5. Department of Internal Medicine; Kyungpook National University Hospital; Daegu Korea
6. Department of Internal Medicine; Korea Cancer Center Hospital; Seoul Korea
7. Hematology-Oncology Clinic; National Cancer Center; Goyang-si Korea
8. Department of Internal Medicine; Yeungnam University Medical Center; Daegu Korea
9. Department of Internal Medicine; Hallym University Sacred Heart Hospital; Hallym University College of Medicine; Anyang Korea
10. Department of Oncology; Asan Medical Center; University of Ulsan, College of Medicine; Seoul Korea
11. Department of Internal Medicine; Seoul National University Bundang Hospital; Seongnam Korea
12. Department of Hemato-Oncology; Inje University Busan Paik Hospital; Busan Korea
13. Department of Internal Medicine; Gachon University Gil Hospital; Incheon Korea
14. Department of Hematology-Oncology; Chonnam National University Hwasun Hospital; Jeollanamdo Korea
15. Department of Internal Medicine; Chungnam National University Hospital; Daejeon Korea
16. Department of Internal Medicine; Dong-A Medical Center; Dong-A University College of Medicine; Busan Korea
17. Department of Internal Medicine; Seoul National University Hospital; Seoul Korea