title: Delayed ultrastructural changes in duodenal crypts of x-irradiated mice.
mesh_terms: D000630:Aminopterin / Q000633:toxicity; D000818:Animals; D003609:Dactinomycin / Q000633:toxicity; D004386:Duodenum / Q000473:pathology / Q000528:radiation effects*; D008297:Male; D051379:Mice; D008854:Microscopy, Electron; D011833:Radiation Injuries, Experimental / Q000473:pathology*
chemical_list: D003609:Dactinomycin; D000630:Aminopterin