1. Pfizer Vaccine Clinical Research & Development, Pearl River, NY, USA
2. Kaiser Permanente Vaccine Study Center, Oakland, CA, USA
3. Jacksonville Center for Clinical Research, Jacksonville, FL, USA
4. Pfizer Vaccine Clinical Research & Development, Collegeville, PA, USA
5. Department of Biostatistics, Syneos Health, Princeton, NJ, USA
6. Pfizer Vaccine Research & Development, Tadworth, Surrey, UK
7. Vaccines Research and Development, Pfizer Pharma GmbH, Berlin, Germany