Additional file 2: Table S2. of Rates and risk factors associated with hospitalization for pneumonia with ICU admission among adults StormsAaron ChenJufu JacksonLisa NordinJames NalewayAllison GlanzJason JacobsenSteven WeintraubEric KleinNicola GargiulloPaul FryAlicia 2017 Current Procedural Terminology (CPT) and ICD-9-CM Procedure Codes for comorbidities, Vaccine Safety Data Link (VSD), 2006–2010. (DOCX 32 kb)