1. Medical Oncology Unit, University Hospital of Parma, Italy
2. Medical Oncology, Azienda Ospedaliera Universitaria Integrata, University of Verona, Verona, Italy
3. Section of Pathological Anatomy, Polytechnic University of the Marche Region, School of Medicine, AOU Ospedali Riuniti, Ancona, Italy
4. Department of Surgery, Cordoba University Medical School, Cordoba, Spain
5. Department of Pathology & Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
6. Division of Oncology, S.Orsola-Malpighi Hospital, Bologna, Italy