1 Center for the Study of Myelofibrosis, Scientific Direction, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Policlinico S. Matteo Foundation, Pavia, Italy. barosig@smatteo.pv.it.
2 Biostatistics and Clinical Trial Center, IRCCS Fondazione Policlinico San Matteo, Pavia, Italy.
3 Center for Hematology, Department of Immunology and Inflammation, Imperial College of Science, Technology and Medicine, London, UK.
4 Center for the Study of Myelofibrosis, Scientific Direction, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Policlinico S. Matteo Foundation, Pavia, Italy.