1. Centers for Disease Control and Prevention FastStats: Death and Mortality http://cdc.gov/nchs/fastats/deaths.htm
2. Deaths: final data for 2006;Heron;Natl Vital Stat Rep.,2009
3. The cost of treating patients with community-acquired pneumonia;Lave;Semin Respir Crit Care Med.,1999
4. Stanton M Improving Treatment Decisions for Patients with Community-Acquired Pneumonia http://www.ahrq.gov/clinic/pneumonia/pneumonria.htm
5. National Hospital Ambulatory Medical Care Survey: 2006 emergency department summary;Pitts;Natl Health Stat Report.,2008