1. Regina Elena National Cancer Institute; Rome Italy
2. Central Cervicovaginal Screening Unit and Center for Cancer Epidemiology and Prevention; Turin Italy
3. Laboratory Screening Unit, Local Health Authority-Umbria 1; Perugia Italy
4. Cytopathology Unit, St Andrea Hospital, “Sapienza” University; Rome Italy
5. Human Papillomavirus Laboratory and Molecular Oncology Unit, Regional Cancer Prevention Laboratory, Institute for Cancer Study and Prevention; Florence Italy
6. Institute for Research and Health Care (IRCCS), “Arcispedale S. Maria Nuova” Hospital; Reggio Emilia Italy
7. Unit 17, Local Health and Social Care Facility; Este Monselice Italy
8. Provincial Health Care Service; Trento Italy
9. Department of Pathology, Avezzano, Sulmona, and L'Aquila Local Health Trust-Abruzzo; Avezzano Italy
10. Department of Pathology; Bolzano Central Hospital; Bolzano Italy
11. Interinstitutional Epidemiology Unit, Reggio Emilia Local Health Trust; Reggio Emilia Italy