title: Seasonal vitamin  A and carotenoid level in the blood plasma of Egyptian sheep.
mesh_terms: D000818:Animals; D002338:Carotenoids / Q000097:blood*; D012621:Seasons; D012756:Sheep; D014801:Vitamin A / Q000097:blood*
chemical_list: D014801:Vitamin A; D002338:Carotenoids