title: The effect of vitamin A on tumour development and regression in chickens infected with Marek's disease and Rous sarcoma virus.
mesh_terms: D000818:Animals; D001358:Avian Sarcoma Viruses; D002645:Chickens; D005260:Female; D008297:Male; D008380:Marek Disease / Q000453:epidemiology* / Q000473:pathology; D009365:Neoplasm Regression, Spontaneous; D010051:Ovarian Neoplasms / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary; D011201:Poultry Diseases / Q000453:epidemiology* / Q000473:pathology; D001357:Sarcoma, Avian / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary*; D013997:Time Factors; D014801:Vitamin A / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D014801:Vitamin A