1. Department of Pediatrics, University of Pennsylvania, Vaxconsult, Doylestown, Pennsylvania, USA
2. Merck & Co., Kenilworth, New Jersey, USA
3. Sanofi-Pasteur, Swiftwater, Pennsylvania, USA
4. City of Hope National Medical Center, Duarte, California, USA
5. Massachusetts General Hospital, Boston, Massachusetts, USA
6. GlaxoSmithKline Vaccines, Rockville, Maryland, USA
7. Moderna Therapeutics, Cambridge, Massachusetts, USA
8. VBI Vaccines, Cambridge, Massachusetts, USA
9. Pfizer Vaccines, Pearl River, New York, USA