title: Research: testing times.
mesh_terms: D001466:Barium Sulfate; D002400:Cathartics; D004733:Enema; D006801:Humans; D008297:Male; D011897:Random Allocation; D013488:Suppositories
chemical_list: D002400:Cathartics; D013488:Suppositories; D001466:Barium Sulfate