1. Department of Medical Oncology, Hospital Clínic of Barcelona, Barcelona, Spain
2. Medical Oncology Unit A.O. Papardo & Department of Human Pathology University of Messina, Messina, Italy
3. Department of Human Pathology of Adult and Evolutive Age “Gaetano Barresi”, Section of Pathology, University of Messina, AOU Policlinico ”G. Martino“ Messina, Italy
4. Pathology Unit, Humanitas Center of Oncology, Catania, Italy
5. Medical Oncology, Humanitas Catania Oncology Center, Catania, Italy
6. G. F. Ingrassia Department, Section of Anatomic Pathology, University Hospital “Policlinico-Vittorio Emanuele”, Catania, Italy