1. IRCCS Azienda Ospedaliero‐Universitaria di Bologna Bologna Italy
2. Institute of Hematology "L. e A. Seràgnoli" DIMES University of Bologna Bologna Italy
3. Department Medical Sciences Dermatologic Clinic University of Turin Italy
4. UOC Dermatology Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico University of Milano Milano Italy
5. Onco‐Hematology Department University "Tor Vergata" Roma Italy
6. Anatomo‐Pathology Unit DISBSP University Politecnica delle Marche Ospedali Riuniti di Ancona Ancona Italy
7. Hematology–Bone Marrow Transplantation Center Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico ‐ University of Milan Italy
8. Anatomo‐Pathology Unit University of Pavia Pavia Italy
9. Clinic of Hematology Ospedali Riuniti Ancona Ancona Italy
10. Center for the Study of Myelofibrosis Laboratory of Biochemistry, Biotechnology and Advanced Diagnostics IRCCS Policlinico S. Matteo Foundation Pavia Italy
11. Dermatology Department University of Firenze Firenze Italy