Authors:Tracy Pondo, Centers for Disease Control and PreventionCharles E. Rose, Centers for Disease Control and PreventionStacey W. Martin, Centers for Disease Control and PreventionWendy A. Keitel, Baylor College of MedicineHarry L Keyserling, Emory UniversityJaniine Babcock, Walter Reed Army Institute of ResearchScott Parker, University of Alabama BirminghamRobert M. Jacobson, Mayo ClinicGregory A. Poland, Mayo ClinicMichael M McNeil, Centers for Disease Control and Prevention