Emergency department visits in asthma: should all be prevented?
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D001249:Asthma / Q000401:mortality / Q000517:prevention & control*; D044383:Black People; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D006300:Health Services Misuse / Q000706:statistics & numerical data*; D006801:Humans; D012307:Risk Factors; D015996:Survival Rate; D014481:United States; D014600:Utilization Review; D044465:White People; D001741:Black or African American