Natural Killer Cell Surface Ag – Ref LabSee reference lab website for details.https://www.labcorp.com/tests/505016/natural-killer-cell-surface-antigen-cd3-sup-sup-cd56-sup-sup-marker-analysisOverviewSpecimenPerformanceCodesAliases505016,PN0013962Specimen TypeSee reference lab website for details.https://www.labcorp.com/tests/505016/natural-killer-cell-surface-antigen-cd3-sup-sup-cd56-sup-sup-marker-analysis