1. Department of Occupational and Environmental Medicine, Epidemiology, Hygiene; National Institute for Insurance Against Accidents at Work (INAIL); Rome Italy
2. Sinonasal Cancer Registry of Piedmont; Occupational Health and Safety Department; ASL CN1; Cuneo Italy
3. Sinonasal Cancer Registry of Lombardy; Department of Preventive Medicine; Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico; Milan Italy
4. Sinonasal Cancer Registry of Emilia-Romagna; Department of Public Health; Unit of Workplace Prevention and Safety; AUSL Imola Italy
5. Sinonasal Cancer Registry of Tuscany; Cancer Prevention and Research Institute (ISPO); Environmental and Occupational Epidemiology Unit; Florence Italy
6. Sinonasal Cancer Registry of Marche; Department of Prevention; SPreSAL; Civitanova Marche Italy
7. Sinonasal Cancer Registry of Lazio; Department of Epidemiology; ASL RM1; Rome Italy
8. Department of Surgery and Translational Medicine; University of Florence; Florence Italy