1. Screening Group, International Agency for Research on Cancer; Lyon France
2. CPO Piemonte and University Hospital “Città della Salute e della Scienza”; Turin Italy
3. Mass Screening Registry/Finnish Cancer Registry; Helsinki Finland
4. Departamento de Tocoginecologia, Divisão de Oncologia; Universidade Estadual de Campinas; Brazil
5. Section of Cancer Surveillance, International Agency for Research on Cancer; Lyon France
6. Institute of Oncology Ljubljana; Ljubljana Slovenia
7. Swedish Cervical Screening Registry; Stockholm Sweden
8. Regionalt cancercentrum Stockholm-Gotland; Stockholm Sweden
9. Cancer Registry of Norway, Oslo, Norway; Finnish Cancer Registry; Helsinki Finland