1. Vaccine Education Center, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
2. Leonard David Institute, University of Pennsylvania, Philadelphia, PA, USA
3. Perelman School of Medicine, Department of Medical Ethics and Health Policy, University of Pennsylvania, Philadelphia, PA, USA
4. Immunize.org, St. Paul, MN, USA
5. The Society for Post-Acute and Long-Term Care, Baltimore, MD, USA
6. American Immunization Registry Association, Washington, DC, USA
7. Philadelphia Department of Public Health, Philadelphia, PA, USA
8. Association of Immunization Managers, Washington, DC, USA