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Journal of Clinical Epidemiology > 2001 > 54 > 6 > 619-626
International Journal of Cardiology > 2000 > 76 > 2-3 > 157-163
Journal of Clinical Epidemiology > 2001 > 54 > 6 > 619-626
International Journal of Cardiology > 2000 > 76 > 2-3 > 157-163