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Jul 2013 Finding ways to speed up cord blood stem cell engraftment has become somewhat of a Holy Grail for the transplant community, both to save patient lives and to increase the utility of banked cord blood. Current research strategies fall into the following three categories: 1. Culture the cord blood stem cells in the lab to "expand" the number of active cells 2. "co-transplant" cord blood stem cells with another stem cell type that will engraft temporarily and act as a bridge until the cord blood stem cells engraft, 3. Enhance the "homing" ability of cord blood stem cells so that they enter the bone marrow faster and engraft.