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Journal of Clinical Epidemiology > 2012 > 65 > 1 > 30-41
Social Science & Medicine > 2011 > 73 > 12 > 1766-1774
Journal of Clinical Epidemiology > 2012 > 65 > 1 > 30-41
Social Science & Medicine > 2011 > 73 > 12 > 1766-1774