Defaecation: a study using radiopaque markers.
D000328:Adult; D001466:Barium Sulfate; D001729:Bismuth; D003106:Colon / Q000000981:diagnostic imaging; D012809:Colon, Sigmoid / Q000000981:diagnostic imaging; D003672:Defecation; D006801:Humans; D008297:Male; D011859:Radiography; D012007:Rectum / Q000000981:diagnostic imaging
D001466:Barium Sulfate; D001729:Bismuth