1. Regional Cancer Prevention Laboratory; ISPO-Cancer Prevention and Research Institute; Florence Italy
2. Cardiopulmonary Department; University Hospital of Pisa; Pisa Italy
3. Radiology Department; University Hospital of Pisa; Pisa Italy
4. Retired, Pneumonology Department; Careggi Hospital; Florence Italy
5. Radiodiagnostic Section, Department of Experimental and Clinical Biomedical Sciences; University of Florence; Florence Italy
6. Radiodiagnostic Unit; ISPO-Cancer Prevention and Research Institute; Florence Italy
7. Biologist, formerly at ISPO-Cancer Prevention and Research Institute; Florence Italy
8. Statistician; Florence Italy
9. Retired, formerly at ISPO-Cancer Prevention and Research Institute; Florence Italy