Finelli Lyn, Swerdlow David L
Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, NE, Atlanta, GA 30333, USA.
Clin Infect Dis. 2013 Jul;57 Suppl 1(Suppl 1):S1-3. doi: 10.1093/cid/cit324.