Journal of Clinical Epidemiology
Volume 58, Issue 2 , Pages 206-208 , February 2005

A cohort study showed that health insurance databases were accurate to distinguish chronic obstructive pulmonary disease from asthma and classify disease severity

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PII: S0895-4356(04)00235-5

doi: 10.1016/j.jclinepi.2004.08.006

Journal of Clinical Epidemiology
Volume 58, Issue 2 , Pages 206-208 , February 2005