1. International Agency for Research on Cancer, Lyon, France;
2. Unit of Cancer Epidemiology, AOU Città della Salute e della Scienza, Hospital of Turin, and
3. Department of Cancer Screening, Centre for Epidemiology and Prevention in Oncology, Turin, Italy;
4. University of Tampere, Finland;
5. Department of Laboratory Medicine, Karolinska Institute, Huddinge, Sweden