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HumanLeukocyteAntigen(HLA)system, knownashumanmajorhistocompatibilitycomplex (MHC),playsakeyroleinantigenprocessing,im muneregulationandotheraspects.HLAisalsobeen calledastransplantingantigenasaccuratetypingof HLAonbothpatientanddonorcanincreasedramat ica