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Journal of Clinical Epidemiology > 2012 > 65 > 4 > 355-357
Journal of Clinical Epidemiology > 2010 > 63 > 8 > 865-874
Journal of Clinical Epidemiology > 2012 > 65 > 4 > 355-357
Journal of Clinical Epidemiology > 2010 > 63 > 8 > 865-874