1. Swine influenza A (H1N1) infection in 2 children-Southern California, March-April 2009;Centers for Disease Control and Prevention (CDC);MMWR Morb Mortal Wkly Rep.,2009
2. Centers for Disease Control and Prevention (CDC) 2010 http://www.cdc.gov/h1n1flu/estimates_2009_h1n1.htm
3. Patients hospitalized with 2009 pandemic influenza a (H1N1)-New York City, May 2009;Centers for Disease Control and Prevention (CDC);MMWR Morb Mortal Wkly Rep.,2010
4. Hospitalized patients with novel influenza a (H1N1) virus infection-California, April-May, 2009;Centers for Disease Control and Prevention (CDC);MMWR Morb Mortal Wkly Rep.,2009
5. Hospitalized patients with 2009 H1N1 influenza in the United States, April-June 2009;Jain;N Engl J Med.,2009