CD40LG and hepatitis A virus infection: RR = reference range; AST = aspartate aminotransferase; ALT = alanine aminotransferase; LDH = lactate dehydrogenase; CRP = C-reactive protein; IgG = immunoglobulin G; IgA = immunoglobulin A; IgM = immunoglobulin M; HIV = human immunodeficiency virus; T-SPOT = T-cell spot; Ab = antibody; RPR = rapid plasma reagin; TP = treponema; Hep = hepatitis.