title: [Serum gastrin levels in diseases of the upper digestive system (chiefly peptic ulcer)].
mesh_terms: D000328:Adult; D005755:Gastrins / Q000097:blood*; D006801:Humans; D008875:Middle Aged; D010437:Peptic Ulcer / Q000097:blood*
chemical_list: D005755:Gastrins