SAN FRANCISCO (EGMN) - When a matched donor is unavailable for allogeneic stem cell transplantation in an adult with acute leukemia, then using stem cells from mismatched umbilical cord blood is as safe and effective as using stem cells from mismatched bone marrow or peripheral blood, an international study of 1,240 cases has found.Stem cell transplants using mismatched cord blood from public cord-blood banks produced similar rates of transplant-related deaths, leukemia-free survival, and overall...