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Canadian Journal of Cardiology > 2010 > 26 > 6 > e190-e196
Journal of Clinical Epidemiology > 1997 > 50 > 7 > 779-786
Canadian Journal of Cardiology > 2010 > 26 > 6 > e190-e196
Journal of Clinical Epidemiology > 1997 > 50 > 7 > 779-786