1. Department of Internal Medicine; University Hospital of Cologne; Cologne Germany
2. Hematology Department; University Hospital La Fe; Valencia Spain
3. Centre Clinique d'Hémobiothérapie; Hôpital de la Pitié-Salpêtrière; Paris France
4. Department of Hematology; Fondazione IRCCS Istituto Nazionale dei Tumori; University of Milano Milano Italy