RecruitingPhase 2Drug trialRegenerative Medicine to Restore Hematopoiesis and Immune Function in Immunodeficiencies and Inherited Bone Marrow FailuresPhase II prospective trial to assess the rates of donor engraftment using reduced intensity conditioning (RIC) hematopoietic stem cell transplant (HSCT) and post-transplant cyclophosphamide (PTCy) for patients with primary immune deficiencies (PID), immune dysregulatory syndromes (IDS), inherited bone marrow failure syndromes (IBMFS), short telomere syndromes, Fanconi anemia, and non-Fanconi DNA double-strand break (DNA-dsb) repair disorder.