Journal of Clinical Epidemiology
Journal of Clinical Epidemiology > 2012 > 65 > 1 > 73-81
Journal of Clinical Epidemiology > 2012 > 65 > 9 > 954-961
Journal of Clinical Epidemiology > 2012 > 65 > 9 > 970-977
Journal of Clinical Epidemiology > 2012 > 65 > 12 > 1321-1328