1. Department of Lymphoma and Myeloma; Department of Hematopathology, Department of Radiation Oncology, University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
2. Department of Hematology, Mayo Clinic, Rochester, Minessotta, USA
3. Department of Oncology, Istituto Tumori, Milano, Italy
4. Department of Hematology, University of Verona, Verona, Italy
5. First Department of Internal Medicine, National and Kapodistrian University, Athens, Greece