Association between the plasma/whole blood lead ratio and history of spontaneous abortion: a nested cross-sectional study
Héctor Lamadrid-Figueroa, Martha M Téllez-Rojo, Mauricio Hernández-Avila, Belem Trejo-Valdivia, Maritsa Solano-González, Adriana Mercado-Garcia, Donald Smith, Howard Hu, and Robert O Wright
BMC Pregnancy Childbirth. 2007; 7: 22. Published online 2007 September 27. doi: 10.1186/1471-2393-7-22.PMCID: PMC2148053