T Robak1, E Matutes2, D Catovsky3, P L Zinzani4, C Buske5. 1. Department of Hematology, Medical University of Lodz, Lodz, Poland. 2. Haematopathology Unit, Hospital Clinic, Barcelona University, Barcelona, Spain. 3. Haemato-Oncology Research Unit, The Institute of Cancer Research, Sutton, Surrey, UK. 4. Seràgnoli Institute of Hematology, University of Bologna, Bologna, Italy. 5. Comprehensive Cancer Center Ulm, Institute of Experimental Cancer Research, University Hospital, Ulm, Germany.