1. Haemato-Oncology Research Unit, Division of Molecular Pathology, The Institute of Cancer Research, London, United Kingdom;
2. Department of Haematology and Oncology, Charité Universitätsmedizin Berlin, Berlin, Germany; and
3. Istituto di Ematologia Seràgnoli, Università degli Studi di Bologna, Policlinico S. Orsola-Malpighi, Bologna, Italy