[1] Fagerstrom Consulting, Smokers Informat Ctr, S-25452 Helsingborg, Sweden
[2] European Inst Oncol, Div Edipdemiol & Biostat, I-20141 Milan, Italy
[3] Univ Vienna, Inst Social Med, A-1080 Vienna, Austria
[4] Curie Sklodowska Inst Oncol, Dept Canc Control & Epidemiol, PL-00973 Warsaw, Poland