Infusion of Allogeneic CD19-Specific T Cells From Peripheral Blood

Hematopoietic stem-cell transplant using cells from a matched family donor (matched related allogeneic HSCT) using a non-T cell depleted graft under standard of care procedures

Allogeneic donor lymphocyte infusion (DLI) starting dose not to exceed 10\^6/m\^2 intravenously between 6 weeks and 12 weeks following allogeneic HSCT.