1. Medical Oncology Unit, University Hospital of Parma, Parma, Italy
2. Department of Medical Oncology, IRCCS San Martino IST, Genova, Italy
3. Department of Medicine and Surgery, University of Parma, Parma, Italy; Medical Oncology Unit, University Hospital of Parma, Parma, Italy
4. Section of Medical Oncology, Department of Medicine, University of Verona and University Hospital Trust, Verona, Italy