1. Agency for Public Health, Lazio Region, Rome
2. Centro per lo Studio e la Prevenzione Oncologica, Florence
3. Azienda Ospedaliera S. Carlo, Potenza
4. Center for Disease Control and Prevention (CCM), Ministry of Health, Rome
5. Coordinamento Screening ASL Roma B, Rome
6. Coordinamento Screening ASL Roma H, Albano, Rome, Italy