title: Periconceptional intake of vitamin A among women and risk of neural tube defect-affected pregnancies.
authors.affiliation: California Birth Defects Monitoring Program, Emeryville, California 94608, USA.
authors.forename: G M
authors.initials: GM
authors.lastname: Shaw
authors.forename: E M
authors.initials: EM
authors.lastname: Velie
authors.forename: D
authors.initials: D
authors.lastname: Schaffer
authors.forename: E J
authors.initials: EJ
authors.lastname: Lammer
mesh_terms: D002140:California / Q000453:epidemiology; D016022:Case-Control Studies; D005260:Female; D005306:Fertilization; D006801:Humans; D007231:Infant, Newborn; D009436:Neural Tube Defects / Q000453:epidemiology / Q000209:etiology*; D016017:Odds Ratio; D011247:Pregnancy; D012307:Risk Factors; D014801:Vitamin A / Q000008:administration & dosage* / Q000009:adverse effects*
chemical_list: D014801:Vitamin A