CD40LG and Acute hepatitis: Once elevated liver function tests (LFTs) were detected, patients underwent an extensive work-up with gastroenterology including serial liver function tests for acute hepatitis of unclear etiology, including Hepatitis B surface antigen, Hepatitis C antibody, Hepatitis A immunoglobulin M (IgM) antibody, Hepatitis E IgM antibody, cytomegalovirus, Epstein-Barr virus (EBV), Herpes Simplex Virus (HSV) 1 and 2, ceruloplasmin levels, and IgG and IgM measurements.