1. Department of Medical Oncology II, National Institute for Cancer Research, Genoa
2. Biostatistics Unit, Chair of Medical Oncology, University, Genoa
3. Department of Medical Oncology, S. Chiara Hospital, Trent
4. Department of Medical Oncology, Centro di Riferimento Oncologico, Aviano
5. Department of Medical Oncology I, Istituto Regina Elena, Rome
6. Department of Medical Oncology “Falck”, Niguarda Hospital, Milan
7. Chair of Internal Medicine, University, Milan
8. CINECA, Bologna, Italy