1 Medical Oncology Unit, San Salvatore Hospital, L'Aquila, Italy; Associazione Tumori Toscana, Firenze, Italy.
2 Medical Oncology Unit Sant'Andrea Hospital of Rome, Via di Grottarossa 1035-39, 00189 Rome, Italy. rgiusti@ospedalesantandrea.it; raffaelegiusti@yahoo.it.
3 Medical Oncology Unit, Sant'Andrea Hospital of Rome, Rome, Italy.
4 Medical Oncology Unit, Ulss 12 Veneziana, Venezia Mestre, Italy.