1. a Medical Oncology Unit, S.Orsola-Malpighi Hospital, Bologna, Italy;
2. b Medical Oncology Unit, Gemelli Hospital, Rome, Italy;
3. c Dermatology Unit, University of Verona, Verona, Italy;
4. d Radiotherapy Unit, Santa Croce and Carle Hospital, Cuneo, Italy
5. e Oncology Unit, Santa Croce and Carle Hospital, Cuneo, Italy;
6. f Oncology Unit, San Paolo Hospital, Milan, Italy;
7. g Oncology Unit, Casa Sollievo della Sofferenza Hospital, San Giovanni Rotondo (FG), Italy