1 Interinstitutional Epidemiology Unit, Azienda Unita Sanitaria Locale di Reggio Emilia, Reggio Emilia, Italy, Arcispedale S. Maria Nuova, National Institute for Research and Treatment, Reggio Emilia, Italy.
2 Center for Cancer Epidemiology and Prevention, AO City of Health and Science, Turin, Italy.
3 Karolinska Institute, Stockholm, Sweden.
4 Department of Pathology, VU University Medical Center, Amsterdam, the Netherlands.
5 Belgian Cancer Center, Scientific Institute of Public Health, Brussels, Belgium.
6 S. C. Laboratory for the Prevention of Cancer, Institute for the Study and Prevention of Cancer, Florence, Italy.
7 Veneto Institute of Oncology, National Institute for Research and Treatment, Padua, Italy.
8 Cancer Epidemiology Research Program, Catalan Institute of Oncology, Barcelona, Spain.
9 Department of Obstetrics and Gynecology, Wolfsburg Hospital, Wolfsburg, Germany.
10 Institute of Microbiology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.