title: The double contrast examination of the small intestine. Preliminary communication of a new technique.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000388:Air; D001466:Barium Sulfate; D002648:Child; D003864:Depression, Chemical; D005260:Female; D005769:Gastrointestinal Motility / Q000187:drug effects; D006801:Humans; D007421:Intestine, Small / Q000000981:diagnostic imaging*; D008297:Male; D008722:Methods; D008875:Middle Aged; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology; D011859:Radiography
chemical_list: D000644:Quaternary Ammonium Compounds; D001466:Barium Sulfate