Journal of Clinical Epidemiology
Journal of Clinical Epidemiology > 2007 > 60 > 2 > 142-154
Journal of Clinical Epidemiology > 2007 > 60 > 8 > 858-862
Journal of Clinical Epidemiology > 2007 > 60 > 9 > 874-882
Journal of Clinical Epidemiology > 2007 > 60 > 2 > 142-154
Journal of Clinical Epidemiology > 2007 > 60 > 8 > 858-862
Journal of Clinical Epidemiology > 2007 > 60 > 9 > 874-882