1. Center for Observational and Real-World Evidence (CORE), MSD, Madrid, Spain
2. Department of Health Promotion, Maternal and Infant Care, Internal Medicine and Excellence Specialties “G. D’Alessandro,” University of Palermo, Palermo, Italy
3. Department of Science for Health Promotion and Mother Child Care, University of Palermo, Palermo, Italy
4. Department of Pediatrics, Buzzi Children’s Hospital, Milan, Italy
5. Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
6. Center for Observational and Real-World Evidence (CORE), MSD, Stockholm, Sweden
7. Medical Affairs Vaccines, Merck & Co., Inc, Kenilworth, NJ, USA
8. Adelphi Values PROVE, Cheshire, UK
9. Department of Vaccine Research, Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Comunitat Valenciana, FISABIO-Public Health, Valencia, Spain
10. Genetics, Vaccines and Infections Research Group (GENVIP), Instituto de Investigación Sanitaria de Santiago, University of Santiago, Santiago de Compostela, Spain
11. Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
12. Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBER-ES), Madrid, Spain
13. Center for Observational and Real-World Evidence (CORE), Merck & Co., Inc, Kenilworth, NJ, USA