%0 Journal Article %T Trimethoprim Use prior to Pregnancy and the Risk of Congenital Malformation: A Register-Based Nationwide Cohort Study %A Jon Tr£¿rup Andersen %A Morten Petersen %A Espen Jimenez-Solem %A Jeppe N£¿rgaard Rasmussen %J Obstetrics and Gynecology International %D 2013 %I Hindawi Publishing Corporation %R 10.1155/2013/364526 %U http://dx.doi.org/10.1155/2013/364526