title: [Observations on the action of the feces and duodenal fluid on viral hepatitis B surface antigen (HBsAg)].
mesh_terms: D004386:Duodenum / Q000032:analysis; D005243:Feces / Q000032:analysis; D006509:Hepatitis B / Q000635:transmission; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D007413:Intestinal Mucosa / Q000032:analysis
chemical_list: D006514:Hepatitis B Surface Antigens