Prevalences of chronic GVHD (top) and Kaplan-Meier estimates of survival (bottom) in 78 patients with aplastic anemia receiving HLA-identical marrow transplants and GVHD prophylaxis with methotrexate/cyclosporine, 39 of whom were conditioned with CY/ATG (current patients) and 39 received CY alone (historical patients). Tick marks indicate surviving patients.