1. Biotechnology Research Area,
2. Center for the Study of Myelofibrosis, Biotechnology Research Area,
3. Immunohematology and Transfusion Service, and
4. Division of Pediatrics, Istituto di Ricovero e Cura a Carattere Scientifico Policlinico San Matteo Foundation, Pavia, Italy; and
5. Haematology Research Centre, Division of Haematology, Department of Medicine, Imperial College London, London, United Kingdom