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Development and Validation of a Multifactorial Risk Index for Predicting Postoperative Pneumonia after Major Noncardiac Surgery
Ahsan M. Arozullah, MD, MPH; Shukri F. Khuri, MD; William G. Henderson, PhD; Jennifer Daley, MD; Participants in the National Veterans Affairs Surgical Quality Improvement Program
Annals of Internal Medicine 2001;135:847-857. doi:10.7326/0003-4819-135-10-200111200-00005

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