1. Department of Oncology, University Campus Bio-Medico, Rome, Italy
2. Department of Specialized, Experimental and Diagnostic Medicine, Sant'Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
3. Adult Mesenchymal Tumor Medical Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
4. Section of Medical Oncology, Department of Surgical, Oncological and Oral Sciences, University of Palermo, Palermo, Italy
5. Department of Oncology and Pathology, General Hospital of Treviso, Treviso, Italy