Worldwide differences in asthma prevalence and mortality. Why is asthma mortality so low in the USA?
D000293:Adolescent; D000328:Adult; D001249:Asthma / Q000453:epidemiology* / Q000401:mortality / Q000628:therapy; D002648:Child; D002675:Child, Preschool; D003191:Comprehensive Health Care; D003644:Death Certificates; D005060:Europe; D006801:Humans; D010353:Patient Education as Topic; D014481:United States