title: LDH-isoenzymes and HBsAg.
mesh_terms: D001782:Blood Donors; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase / Q000097:blood*
chemical_list: D006514:Hepatitis B Surface Antigens; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase