1. Medical Oncology, Sofía University Hospital, European University of Madrid, Madrid, 28702, Spain
2. Medical Oncology, Hospital Universitario de Torrejón, Universidad Francisco Vitoria, Madrid, 28309, Spain
3. Medical Oncology, Hospital Universitario La Paz, Madrid, 28701, Spain
4. Medical Oncology, Hospital Universitario Fundación de Alcorcón, Alcorcón, 28405, Spain
5. Medical Oncology, Hospital Universitario del Henares, Madrid, 28232, Spain