1. Institute for Global Health, University of Siena, 53100 Siena, Italy
2. Think Vaccines LLC, Houston, TX 77005, USA
3. Sanofi, Swiftwater, PA 18370, USA
4. International Vaccine Institute (IVI), Seoul 08826, Republic of Korea
5. Department of Pediatrics, University of Oxford, Oxford OX1 2JD, UK