Regional differences in process of care and outcomes for older acute myocardial infarction patients in the United States and Ontario, Canada
Ko DT, Krumholz HM, Wang Y, Foody JM, Masoudi FA, Havranek EP, You JJ, Alter DA, Stukel TA, Newman AM, Tu JV. Circulation. 2007; 115(2):196-203. Epub 2006 Dec 26.