RecruitingPhase 2Drug trialAlloSCT for Malignant and Non-malignant Hematologic Diseases Utilizing Alpha/Beta T Cell and CD19+ B Cell DepletionChildren, adolescents, and young adults with malignant and non-malignant conditionsundergoing an allogeneic stem cell transplantation (AlloSCT) will have the stem cells selected utilizing α/β CD3+/CD19+ cell depletion. All other treatment is standard of care.