title: Factors affecting the laboratory management of human serum and liver vitamin A analysis.
mesh_terms: D001793:Blood Preservation; D002338:Carotenoids / Q000032:analysis / Q000097:blood; D005333:Fetus; D006461:Hemolysis; D006493:Heparin; D006801:Humans; D008027:Light; D008099:Liver / Q000032:analysis*; D008722:Methods; D013472:Sunlight; D013696:Temperature; D014021:Tissue Preservation; D014801:Vitamin A / Q000032:analysis* / Q000097:blood
chemical_list: D014801:Vitamin A; D002338:Carotenoids; D006493:Heparin