NCT07366801 2026-01-26Co-infusion of Treg-enriched Donor Lymphocytes With CD3-depleted Hematopoietic Stem Cell Graft to Prevent Graft-versus Host Disease After Allogeneic Hematopoietic Stem Cell Transplantation Among Children With Hematologic MalignanciesFederal Research Institute of Pediatric Hematology, Oncology and ImmunologyPhase 2/3 Recruiting64 enrolled