Journal of Clinical Epidemiology
Journal of Clinical Epidemiology > 2012 > 65 > 3 > 301-308
Journal of Clinical Epidemiology > 2012 > 65 > 8 > 863-868
Journal of Clinical Epidemiology > 2012 > 65 > 3 > 301-308
Journal of Clinical Epidemiology > 2012 > 65 > 8 > 863-868