1. Unit of Hematology, Azienda Ospedaliera Universitaria Senese & University of Siena, Siena, Italy;
2. Hematology Department, Azienda Ospedaliera Universitaria Careggi, Firenze, Italy;
3. Radiotherapy Department, Azienda Ospedaliera Universitaria Senese, Siena, Italy;
4. Radiotherapy Department, Azienda Ospedaliera Universitaria Careggi, Firenze, Italy