1. Section of Infectious Diseases, Department of Pediatrics, University of Colorado School of Medicine , Aurora, Colorado , USA
2. Section of Rheumatology, Department of Pediatrics, University of Colorado School of Medicine , Aurora, Colorado , USA
3. Center for Vaccine Development and Global Health, University of Maryland School of Medicine , Baltimore, Maryland , USA
4. Division of Infectious Diseases and Tropical Pediatrics, Department of Pediatrics, University of Maryland School of Medicine , Baltimore, Maryland , USA
5. Department of Epidemiology and Public Health, University of Maryland School of Medicine , Baltimore, Maryland , USA
6. Ipsos US Public Affairs , Washington, District of Columbia , USA
7. Adult and Child Center for Health Outcomes Research and Delivery Science, University of Colorado School of Medicine, Aurora, Colorado , USA