Trends in asthma mortality. Death certification in asthma is inaccurate.
Berrill
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WT
D001249:Asthma / Q000401:mortality*; D002423:Cause of Death; D003644:Death Certificates; D004739:England / Q000453:epidemiology; D006801:Humans; D012680:Sensitivity and Specificity; D014852:Wales / Q000453:epidemiology