1. Section of Pathological Anatomy, Polytechnic University of the Marche Region, School of Medicine, United Hospitals, Ancona, Italy
2. Division of Oncology, IRCCS Azienda Ospedaliero-Universitaria Di Bologna, Bologna, Italy
3. Department of Surgery, Cordoba University Medical School, Cordoba, Spain
4. Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, USA
5. Oncology department, Macerata Hospital, Macerata, Italy