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Canadian Journal of Cardiology > 2007 > 23 > 7 > 557-560
Canadian Journal of Cardiology > 2006 > 22 > 7 > 556-558
Canadian Journal of Cardiology > 2007 > 23 > 7 > 557-560
Canadian Journal of Cardiology > 2006 > 22 > 7 > 556-558