CD79A and celiac disease: The workup for viral hepatitis (hepatitis A immunoglobulin [Ig] G and IgM, hepatitis B surface antigen, antibody and core, hepatitis C and E antibodies), autoimmune hepatitis (anti-nuclear antibody, anti-smooth muscle antibody, anti-liver kidney microsomal antibody), Wilson disease (ceruloplasmin, 24-hour urinary copper), celiac disease (tissue transglutaminase IgA, IgA total), alpha-1-antitrypsin deficiency level, hemochromatosis (iron study with ferritin level), thyroid disease (thyroid-stimulating hormone), malignancy, and other infectious etiologies was all negative.