title: Serum vitamin A and carotene levels in Thai cancer patients.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002338:Carotenoids / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000097:blood*; D014801:Vitamin A / Q000097:blood*
chemical_list: D014801:Vitamin A; D002338:Carotenoids