From the Department of Epidemiology, School of Public Health, University of Alabama at Birmingham ; University of California, San Francisco ; and Veterans Affairs Medical Center, San Francisco, CA .
http://atvb.ahajournals.org/content/early/2013/11/21/ATVBAHA.113.302191.short?rss=1
http://atvb.ahajournals.org/content/early/2013/11/21/ATVBAHA.113.302191.short?rss=1
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