Authors' Affiliations: 1Adult Sarcoma Medical Oncology Unit, Department of Cancer Medicine, 2Experimental Molecular Pathology Unit, Department of Pathology, Departments of 3Surgery and 4Radiology, 5Scientific Directorate, Fondazione Istituto Di Ricovero e Cura a Carattere Scientifico Istituto Nazionale Tumori, Milan, Italy (At 2010-05-01)