Chimerism analysis of patient no. 7 using primers MS51 and 33.6. Left, recipient DNA (R) was diluted in donor DNA (D) to estimate the chimerism level in posttransplant samples (right). Three donor-specific bands (solid arrow) and 2 recipient-specific bands (open arrow) were identified. Posttransplant samples were sorted into myeloid cells (M) and T cells (T) on days 56, 70, and 100 and showed donor T-cell engraftment preceding donor myeloid engraftment.