Journal of Clinical Epidemiology
Journal of Clinical Epidemiology > 2012 > 65 > 4 > 413-422
Journal of Clinical Epidemiology > 2012 > 65 > 8 > 906-914
Journal of Clinical Epidemiology > 2012 > 65 > 4 > 413-422
Journal of Clinical Epidemiology > 2012 > 65 > 8 > 906-914