Author information:
(1)National Center for Immunization and Respiratory Diseases, Centers for 
Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, United 
States. Electronic address: ndv1@cdc.gov.
(2)National Center for Immunization and Respiratory Diseases, Centers for 
Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, United 
States.
(3)Adult and Child Consortium for Health Outcomes Research and Delivery Science, 
University of Colorado Anschutz Medical Campus and Children's Hospital Colorado, 
13001 E 17th Pl, Aurora, CO, United States; Division of General Internal 
Medicine, 777 Bannock St, Denver, CO 80204, United States.
(4)Office of the Associate Director for Communication, Centers for Disease 
Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, United States.
(5)Adult and Child Consortium for Health Outcomes Research and Delivery Science, 
University of Colorado Anschutz Medical Campus and Children's Hospital Colorado, 
13001 E 17th Pl, Aurora, CO, United States; Department of Pediatrics, Colorado 
School of Public Health, University of Colorado Anschutz Medical Campus, 13001 E 
17th Pl, Aurora, CO, United States.
(6)Department of Pediatrics, Colorado School of Public Health, University of 
Colorado Anschutz Medical Campus, 13001 E 17th Pl, Aurora, CO, United States.
(7)Adult and Child Consortium for Health Outcomes Research and Delivery Science, 
University of Colorado Anschutz Medical Campus and Children's Hospital Colorado, 
13001 E 17th Pl, Aurora, CO, United States; Department of Community and 
Behavioral Health, Colorado School of Public Health, University of Colorado 
Anschutz Medical Campus, 13001 E 17th Pl, Aurora, CO, United States.
(8)Adult and Child Consortium for Health Outcomes Research and Delivery Science, 
University of Colorado Anschutz Medical Campus and Children's Hospital Colorado, 
13001 E 17th Pl, Aurora, CO, United States.