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Journal of Clinical Epidemiology > 2012 > 65 > 1 > 62-72.e1
Government Information Quarterly > 2009 > 26 > 3 > 450-458
Journal of Clinical Epidemiology > 2006 > 59 > 10 > 1057.e1-1057.e9
American Journal of Preventive Medicine > 1999 > 17 > 3 > 211-229