"A study of excess mortality during influenza epidemics in the United States, 1968-1976".
D000368:Aged; D009202:Cardiomyopathies / Q000209:etiology / Q000401:mortality*; D004196:Disease Outbreaks / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007251:Influenza, Human / Q000150:complications / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D011014:Pneumonia / Q000150:complications; D014481:United States