1. Family Federation of Finland, Sexual Health Clinic, Helsinki, Finland
2. Departments of Pathology and Obstetrics and Gynecology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico, USA
3. Department of Obstetrics and Gynaecology, University of Helsinki, Helsinki, Finland
4. Cancer Epidemiology Research Program, Institut Català d'Oncologia (ICO), IDIBELL, Biomedical Research Centre Network for Epidemiology and Public Health (CIBER-ESP), L'Hospitalet de Llobregat, Catalonia, Spain
5. Microbiology and Infectious Diseases Department, Royal Women's Hospital and Department of Obstetrics and Gynaecology, University of Melbourne, Murdoch Childrens Research Institute, Melbourne, Victoria, Australia
6. Vaccine Trials Group, Telethon Institute for Child Health Research, Perth, Western Australia, and Sydney University Discipline of Paediatrics and Child Health, Children's Hospital at Westmead, Sydney, New South Wales, Australia
7. University Federal of Rio Grande do Sul, Hospital de Clínica de Porto Alegre, Porto Alegre, Brazil
8. Unidad de Investigación Epidemiológica y en Servicios de Salud, Instituto Mexicano del Seguro Social, Morelos, Mexico
9. Department of Obstetrics and Gynecology, College of Medicine and the Hospital, National Taiwan University, Taipei, Taiwan
10. Manchester Academic Health Science Centre, Central Manchester University Hospitals NHS Foundation Trust, St Mary's Hospital, Manchester, United Kingdom
11. University of Campinas, Campinas, Brazil
12. Chulalongkorn University, Department of Obstetrics and Gynaecology, Faculty of Medicine, Bangkok, Thailand
13. University of the Philippines, College of Medicine, Philippine General Hospital, Makati Medical Centre, Makati City, Philippines
14. Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, United Kingdom
15. University of Alberta, Edmonton, Alberta, Canada
16. University of Manitoba, Winnipeg, Manitoba, Canada
17. Central Laboratory and Vaccination Centre, Stiftung Juliusspital, Academic Teaching Hospital of the University of Wuerzburg, Wuerzburg, Germany
18. Department of Gynaecology, University Hospital KU Leuven Gasthuisberg, Leuven, Belgium
19. Cancer Epidemiology Research Program, Institut Català d'Oncologia (ICO), IDIBELL, Network on Cooperative Cancer Research (RTICC), L'Hospitalet de Llobregat, Catalonia, Spain
20. Centre for AIDS Programme of Research in South Africa, Durban, South Africa
21. Afdelingshoofd Gynaecologie-Oncologie, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
22. GSK Vaccines, Wavre, Belgium
23. University of Tampere, School of Public Health, Tampere, Finland
24. GSK Vaccines, King of Prussia, Pennsylvania, USA