1. Division of Medical Oncology at S. Maria Goretti Hospital, Latina, Italy
2. Division of Medical Oncology at Treviglio Hospital, Treviglio, Italy
3. Department of Medical Oncology at University “La Sapienza,” Rome, Italy
4. Fondazione S. Maugeri, Pavia, Italy
5. Division of Medical Oncology at the European Institute of Oncology, Milano, Italy.