1. Department of Internal Medicine (K.H.B., H.S.K., J.H.H., M.I.K., B.Y.C., K.W.L., H.Y.S., S.K.K.), Seoul 150-010, Korea
2. The Catholic University of Korea, College of Medicine, and Sungkyunkwan University School of Medicine (W.Y.L.), Seoul 150-010, Korea
3. Mizmedi Hospital (K.W.O.), Seoul 150-010, Korea
4. Hematopoietic Stem Cell Transplantation Center (C.C.K.), Seoul 150-010, Korea