title: [A laboratory study of HBsAg detection using punctured blood on gingiva].
mesh_terms: D005881:Gingiva; D006509:Hepatitis B / Q000097:blood / Q000635:transmission*; D006511:Hepatitis B Antigens / Q000032:analysis*; D006801:Humans
chemical_list: D006511:Hepatitis B Antigens