1. Romagna Cancer Registry, Romagna Cancer Institute (Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS), Meldola, Forlì, Italy
2. Department of Health, Regional Administration, Emilia-Romagna Region, Bologna, Italy
3. Department of Morphology, Surgery and Experimental Medicine, University of Ferrara and Local Health Authority, Ferrara, Italy
4. Cancer Prevention Unit, Local Health Authority, Forlì, Italy