1. Section of Pathological Anatomy, Polytechnic University of the Marche Region, School of Medicine, United Hospitals, Ancona, Italy
2. Oncology Unit, Macerata Hospital, Macerata, Italy
3. Division of Oncology, S. Orsola-Malpighi Hospital, Bologna, Italy
4. Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, USA
5. Pathology Service, Champalimaud Clinical Center, Lisbon, Portugal