1. Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy
2. Department of Medical, Surgical and Advanced Technologies “G.F. Ingrassia”, University of Catania, 95123 Catania, Italy
3. Integrated Cancer Registry of Catania-Messina-Siracusa-Enna, University of Catania, 95123 Catania, Italy
4. Mediterranean Institute of Oncology (IOM), 95029 Catania, Italy
5. Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY 11794, USA
6. Department of Family, Population and Preventive Medicine, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY 11794, USA