Journal of Clinical Epidemiology
Journal of Clinical Epidemiology > 2012 > 65 > 1 > 100-106
Journal of Clinical Epidemiology > 2012 > 65 > 6 > 679-685
Journal of Clinical Epidemiology > 2012 > 65 > 8 > 817-826
Journal of Clinical Epidemiology > 2012 > 65 > 9 > 978-988