title: Selection bias and vitamin E status in cystic fibrosis.
authors: Ronald J
authors: RJ
authors: Sokol
mesh_terms: D002648:Child; D002784:Cholesterol / Q000097:blood; D003550:Cystic Fibrosis / Q000097:blood*; D019587:Dietary Supplements; D006801:Humans; D015983:Selection Bias; D014810:Vitamin E / Q000097:blood*; D014811:Vitamin E Deficiency / Q000097:blood / Q000517:prevention & control
chemical_list: D014810:Vitamin E; D002784:Cholesterol