1. Department of Hematology & Medical Oncology, Hospital Universitario Morales Meseguer, Murcia, Spain
2. Oncology Service, Hospital Universitario Central de Asturias, Oviedo, Spain
3. Radiology Service, Neuro-radiology Section, Hospital Universitario Morales Meseguer, Murcia, Spain
4. Radiology Service, Hospital Universitario de Getafe, Madrid, Spain
5. Department of Neurology, Hospital Universitario Central de Asturias, Oviedo, Spain