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Prevention of congenital malformations and other adverse pregnancy outcomes with 4.0 mg of folic acid: community-based randomized clinical trial in Italy and the Netherlands.
Bortolus R, Blom F, Filippini F, van Poppel MN, Leoncini E, de Smit DJ, Benetollo PP, Cornel MC, de Walle HE, Mastroiacovo P; Italian and Dutch folic acid trial study groups. Bortolus R, et al. BMC Pregnancy Childbirth. 2014 May 13;14:166. doi: 10.1186/1471-2393-14-166. BMC Pregnancy Childbirth. 2014. PMID: 24884885 Free PMC article. Clinical Trial.