1. Department of Environmental Health Sciences, Istituto di Ricerche Farmacologiche Mario Negri IRCCS
2. Epidemiology and Health Research Lab, Institute of Clinical Physiology, National Research Council of Italy (IFC-CNR)
3. TobaccoFree Research Institute Ireland
4. Department of Primary Care and Public Health, Imperial College London
5. Oncologic Network, Prevention and Research Institute (ISPRO)
6. Agència de Salut Pública de Barcelona
7. Polytechnic University of Cartagena (UPCT)
8. School of Medicine, University Vita-Salute San Raffaele
9. Hospital Universitario La Princesa (IISP)
10. Consortium for Biomedical Research in Respiratory Diseases (CIBERES)
11. Maastricht University Medical Centre, GROW- School for Oncology and Developmental Biology, Department of Epidemiology
12. Hellenic Cancer Society