1. Lymphoma Unit, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) San Raffaele Scientific Institute, Milan, Italy
2. Department of Medicine, Division of Hematology, Valduce Hospital, Como, Italy
3. Neuroradiology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
4. Vita-Salute San Raffaele University, Milan, Italy
5. Hematology and BMT Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy