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3. Ethics of a randomized trial of periconceptual vitamins. JAMA; 1989 Sep 22-29; 262(12):1633-4. PubMed ID: 2671419 [No Abstract] [Full Text] [Related]
4. Do vitamins prevent neural tube defects (and can we find out ethically)? Lipsett MB; Fletcher JC Hastings Cent Rep; 1983 Aug; 13(4):5-8. PubMed ID: 6629750 [TBL] [Abstract][Full Text] [Related]
5. Neural-tube defects and vitamins: the need for a randomized clinical trial. Wald NJ; Polani PE Br J Obstet Gynaecol; 1984 Jun; 91(6):516-23. PubMed ID: 6375715 [TBL] [Abstract][Full Text] [Related]
18. Prevention of the first occurrence of neural-tube defects by periconceptional vitamin supplementation. Czeizel AE; Dudás I N Engl J Med; 1992 Dec; 327(26):1832-5. PubMed ID: 1307234 [TBL] [Abstract][Full Text] [Related]