1. Universitary Hospital Virgen del Rocio, Sevilla, Spain
2. Department of Interdisciplinary Oncology, HELIOS Klinikum Berlin-Buch, Schwanebecker Chaussee 50, 13125 Berlin, Germany
3. Medical Oncology Unit 2 – Adult Mesenchymal Tumors & Rare Cancers, Department of Cancer Medicine, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
4. Department of Medical Oncology, Centre Leon Berard, Lyon, France