Xu, H Natural antipig xenoantibody is absent in neonatal human serum. [electronic resource] - The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation - 749-54 p. digital Publication Type: Journal Article ISSN: 1053-2498 Subjects--Topical Terms: AdultAnimalsAntibodies, Heterophile--immunologyCytotoxicity, Immunologic--immunologyEndothelium, Vascular--immunologyEnzyme-Linked Immunosorbent AssayFeasibility StudiesFetal Blood--immunologyHeart Transplantation--immunologyHumansImmunoglobulin M--bloodInfant, NewbornLymphocytes--immunologyReference ValuesSwine--immunologyTransplantation, Heterologous