?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Casas%2C+J.P.&rft.aufirst=J.P.&rft.aulast=Casas&rft.atitle=Endothelial+nitric+oxide+synthase+genotype+and+ischemic+heart+disease%3A+meta-analysis+of+26+studies+involving+23028+subjects&rft.volume=109&rft.date=23+March+2004&rft.issue=11&rft.pages=1359-1365&rft.issn=0009-7322&rft.title=Circulation&rft.genre=article