title: Acute abdominal pain, vasculitis, and hepatitis B antigenemia.
mesh_terms: D000006:Abdomen, Acute / Q000209:etiology*; D000328:Adult; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D008297:Male; D010146:Pain / Q000473:pathology; D010488:Polyarteritis Nodosa / Q000150:complications / Q000276:immunology* / Q000473:pathology
chemical_list: D006514:Hepatitis B Surface Antigens