1. Division of Hematology, Department of Internal Medicine, University Hospital Ospedale di Circolo e Fondazione Macchi, Varese, Italy;
2. Institute of Pathology, University of Cologne, Cologne, Germany;
3. Laboratoire d'Hématologie, Hôpital du Bocage, Centre Hospitalier Universitaire (CHU), Dijon, France;
4. Department of Hematology Oncology and Human Pathology, University of Pavia & Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Policlinico San Matteo, Pavia, Italy;
5. Hematology Department and Research Foundation, Ospedali Riuniti, Bergamo, Italy;
6. Department of Internal Medicine I, Division of Hematology and Blood Coagulation, Medical University of Vienna, Vienna, Austria;
7. Senckenberg Institute of Pathology, University of Frankfurt, Frankfurt, Germany;
8. Department of Cell Therapy and Hematology, San Bortolo Hospital, Vicenza, Italy;
9. Department of Medical and Surgical Sciences, University of Padova Medical School, Padova, Italy;
10. Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, MN;
11. Section of Hematology, Department of Critical Care, University of Florence, Florence, Italy; and
12. Institute of Pathology, Medical University of Vienna, Vienna, Austria