1. Department of Pediatrics, Section of Infectious Diseases and Global Health, Yale University School of Medicine , New Haven, CT , USA
2. Department of Biostatistics, Section of Health Informatics, Yale University School of Public Health , New Haven, CT , USA
3. Vaccine Education Center, The Children’s Hospital of Philadelphia , Philadelphia, PA , USA
4. Department of Pediatrics, Division of Infectious Disease, University of Pennsylvania Perelman School of Medicine , Philadelphia, PA , USA
5. Department of Pediatrics, University of California Irvine School of Medicine , Irvine, CA 92697 , USA
6. Division of Infectious Diseases, Children’s Health of Orange County , Orange, CA 92868 , USA