1. Risk factors for pregnancy-related mortality: a prospective study in rural Nepal;Christian;Public Health,2008
2. Preterm delivery risk in migrants in Italy: an observational prospective study;Sosta;J Travel Med,2008
3. Medical-care expenditures attributable to cigarette smoking during pregnancy - United States, 1995;Centers for Disease Control and Prevention (CDC);MMWR Morb Mortal Wkly Rep,1997
4. Quantifying the effect of folic acid;Wald;Lancet,2001
5. Effects of fish-oil and folate supplementation of pregnant women on maternal and fetal plasma concentrations of docosahexaeonic acid and eicosapentaenoic acid: a European randomized multicenter trial;Krauss-Etschmann;Am J Clin Nutr,2007