1. Department of Hematology Oncology, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico [IRCCS] Policlinico San Matteo, and
2. Department of Molecular Medicine, University of Pavia, Pavia, Italy;
3. Laboratorio Congiunto Malattie Mieloproliferative Croniche, Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy;
4. Hematology and Hematopathology Departments, Hospital Clinic, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain; and
5. Anatomic Pathology Section and
6. Center for the Study of Myelofibrosis, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy