 NOTE: Patients with acute lymphocytic leukemia ALL, secondary acute myeloid leukemia AML, severe combined immunodeficiency, familial erythrophagocytic lymphohistiocytosis FELviral-associated hemophagocytic syndrome VAHS, inborn errors of metabolism, aplastic anemia, Fanconis anemia, or Diamond-Blackfan anemia who have an unrelated umbilical cord blood donor may proceed directly to transplantation. 