1. Department of Hematology, Azienda Ospedaliera-Universitaria Careggi, University of Florence, Florence, Italy
2. Department of Biomedical Sciences, Biological Chemistry Section, University of Modena and Reggio Emilia, Modena, Italy
3. INSERM U602, University Paris 11, Institut André Lwoff, Villejuif Cedex, France
4. Unit of Clinical Epidemiology, IRCCS Policlinico S. Matteo, Pavia, Italy
5. Department of Hematology, Oncology and Molecular Medicine, Istituto Superiore Sanità, Rome, Italy
6. Department of Pathology, University of Illinois at Chicago, Illinois, USA, on behalf of the MPD Research Consortium