title: Effects of vitamin A on 3-methylcholanthrene-induced squamous metaplasias and early tumors in the respiratory tract of rats.
mesh_terms: D000818:Animals; D002294:Carcinoma, Squamous Cell / Q000139:chemically induced* / Q000517:prevention & control; D006965:Hyperplasia; D007267:Injections; D007441:Intubation, Gastrointestinal; D008099:Liver / Q000378:metabolism; D008175:Lung Neoplasms / Q000139:chemically induced* / Q000517:prevention & control; D008679:Metaplasia; D008748:Methylcholanthrene / Q000037:antagonists & inhibitors; D011230:Precancerous Conditions; D051381:Rats; D013997:Time Factors; D014801:Vitamin A / Q000008:administration & dosage / Q000378:metabolism / Q000494:pharmacology*
chemical_list: D014801:Vitamin A; D008748:Methylcholanthrene