1. Centro de Pesquisa Clínica, Associação Obras Sociais Irmã Dulce and Oswaldo Cruz Foundation, Brazilian Ministry of Health, Salvador, Bahia, Brazil
2. Department of Cancer Epidemiology, Center for Infection Research (CIRC), Moffitt Cancer Center, Tampa, Florida, USA
3. Center for Clinical Pharmacology, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
4. Department of Clinical Science, University of Bergen/Womens Clinic, Haukeland University Hospital, Bergen, Norway
5. Department of Gynecology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
6. Fundación Centro de Investigación Clínica CIC, Medellín, Colombia
7. University of Antwerp, Vaccine & Infectious Disease Institute, Centre for the Evaluation of Vaccination, Antwerp, Belgium
8. Leuven University Vaccinology Center, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
9. Merck & Co. Inc., Kenilworth, New Jersey, USA