1. Department of Virology Helsinki University Hospital Diagnostic Center and University of Helsinki and HUS Helsinki Finland
2. Department of Obstetrics and Gynecology Helsinki University Hospital and University of Helsinki Helsinki Finland
3. City of Helsinki Finland
4. Center for Cervical Cancer Prevention, Department of Pathology Karolinska University Laboratory and Karolinska Institutet Stockholm Sweden
5. Department of Pathology Helsinki University Hospital Diagnostic Center and University of Helsinki Helsinki Finland