1. CAP Centelles, Centelles , Barcelona , Spain
2. Hospital de Bellvitge, L'Hospitalet de Llobregat , Barcelona , Spain
3. Clinical Research Center , Tartu , Estonia
4. Center for Vaccinology, Ghent University Hospital , Ghent , Belgium
5. Fundación para el Fomento de la Investigación Sanitaria y Biomédica , Valencia , Spain
6. Centre for the Evaluation of Vaccination, University of Antwerp , Antwerp , Belgium
7. KU Leuven, Leuven University Vaccinology Center, Department of Public Health and Primary Care , Leuven , Belgium
8. Innomedica Medical Center , Tallinn , Estonia
9. Ormeau Health Centre , Belfast , UK
10. John Radcliffe Hospital, Oxford University Hospitals NHS Trust , Oxford , UK
11. Lakeside Surgery, Lakeside Healthcare , Corby , UK
12. Ashgate Medical Practice , Chesterfield , UK
13. MOC Research, Mishawaka , Indiana, Indiana , USA
14. Haywood Community Hospital—Midlands Partnership NHS Foundation Trust , Stoke-on-Trent , UK
15. Senior Clinical Trials, Laguna Hills , California, California , USA
16. Royal South Hants Hospital, Clinical Research Office, Solent NHS Trust , Southampton , UK
17. Piedmont Research Partners, LLC, Fort Mill , South Carolina , USA
18. GSK , Bangalore , India
19. GSK , Wavre , Belgium
20. Freelance c/o GSK , Wavre , Belgium