1. Divisions of Hematology; Mayo Clinic; Rochester Minnesota
2. Division ofHematopathology, Mayo Clinic; Rochester Minnesota
3. Cytogenetics, Departments of Medicine and Laboratory Medicine; Mayo Clinic; Rochester Minnesota
4. Department of Experimental and Clinical Medicine; CRIMM, Center Research and Innovation of Myeloproliferative Neoplasms, Azienda Ospedaliera Universitaria Careggi, University of Florence; Florence Italy