http://www.sciencedirect.com/science/article/pii/S0022399903005737 http://www.sciencedirect.com/science/article/pii/S0022399903... http://circoutcomes.ahajourn

http://www.sciencedirect.com/science/article/pii/S0022399903005737 http://www.sciencedirect.com/science/article/pii/S0022399903... http://circoutcomes.ahajournals.org/content/2/1/25.short http://circoutcomes.ahajournals.org/content/2/1/25.short