title: Commentary: does use of food supplements influence the twin rate? New evidence from a randomized controlled trial.
authors.affiliation: Maternal Nutrition Group, Danish Epidemiology Science Centre, Statens Serum Institut, DK-2300 Copenhagen S, Denmark. sfo@ssi.dk
authors.forename: S F
authors.initials: SF
authors.lastname: Olsen
mesh_terms: D019587:Dietary Supplements; D005260:Female; D005313:Fetal Death / Q000453:epidemiology / Q000517:prevention & control; D006801:Humans; D006814:Hungary / Q000453:epidemiology; D007226:Infant Mortality; D007231:Infant, Newborn; D008428:Maternal Mortality; D009390:Nepal / Q000453:epidemiology; D009436:Neural Tube Defects / Q000453:epidemiology / Q000517:prevention & control; D011247:Pregnancy; D011256:Pregnancy Outcome; D011272:Pregnancy, Multiple; D016032:Randomized Controlled Trials as Topic; D014427:Twins / Q000706:statistics & numerical data*; D014801:Vitamin A / Q000008:administration & dosage; D019207:beta Carotene / Q000008:administration & dosage
chemical_list: D019207:beta Carotene; D014801:Vitamin A