1. Unit of Cancer Epidemiology, Scientific Institute of Public Health, Brussels, Belgium
2. Bulgarian Cancer Registry, Sofia, Bulgaria
3. Estonian Cancer Registry, Tallinn, Estonia
4. Latvian Cancer Registry, Riga, Latvia
5. Lithuanian Cancer Registry, Vilnius, Lithuania
6. I. Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
7. Institute of Oncology, Cluj, Romania
8. Descriptive Studies and Health Planning Unit, Fondazione IRCCS “Istituto Nazionale dei Tumori”, Milan, Italy