1. Section of General Pathology, Clinics and Oncology, Department of Biomedical and Biotechnological Sciences, University of Catania, I‑95123 Catania, Italy
2. Epidemiology Unit, IRCCS Istituto Nazionale Tumori ‘Fondazione G. Pascale’, I‑80131 Naples, Italy
3. Department of Systems Medicine, Medical Oncology, University of Rome Tor Vergata, I‑00133 Rome, Italy
4. Medical Oncology Unit, Azienda Ospedaliera Cannizzaro, I‑95126 Catania, Italy
5. Department of Drug Sciences, University of Catania, I‑95123 Catania, Italy
6. Medical Oncology Unit, Garibaldi Hospital, I‑95122 Catania, Italy
7. Laboratory of Clinical Virology, Medical School, University of Crete, 71003 Heraklion, Greece