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Relation between Influenza Vaccination and Outpatient Visits, Hospitalization, and Mortality in Elderly Persons with Chronic Lung Disease
Kristin L. Nichol, MD, MPH; Leslie Baken, MD; Andrew Nelson, MPH
Annals of Internal Medicine 1999;130:397-403.
doi:10.7326/0003-4819-130-5-199903020-00003
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