Journal of Clinical Epidemiology
Journal of Clinical Epidemiology > 2012 > 65 > 5 > 544-552
Journal of Clinical Epidemiology > 2012 > 65 > 10 > 1031-1040
Journal of Clinical Epidemiology > 2012 > 65 > 5 > 544-552
Journal of Clinical Epidemiology > 2012 > 65 > 10 > 1031-1040