Event-free survival by risk group/stem cell source. Recipients of related donor (RD) transplants were more often CR1 or intermediate risk CR2 (21 RD vs. 13 URD), while recipients of unrelated donor (URD) transplantation were more often high risk CR2 or CR3 (20 URD vs. 5 RD). When stratified by risk, survival after related or unrelated donor transplantation was similar {2-year EFS 81% [standard error (SE) 8·5] vs. 73% (SE 13·4), RD versus URD CR1 or intermediate risk (dashed line URD, solid line RD); 2-year EFS 50% (SE20) vs. 44% (SE 11), RD versus URD high risk CR2 or CR3 (dotted line RD, dot-dash line URD)}.