1 Department of Internal Medicine I, Division of Hematology and Blood Coagulation, Medical University Vienna, Vienna, Austria. heinz.gisslinger@meduniwien.ac.at.
2 AOP Health, Vienna, Austria.
3 Medical University of Plovdiv, Plovdiv, Bulgaria.
4 Teaching Unit of the Hematology Department, University Hospital in Krakow, Krakow, Poland.
5 Clinical Hematology Clinic, Multiprofile Hospital for Active Treatment "Sveta Marina", Varna, Bulgaria.
6 Department of Internal Medicine II, Kaposi Mor County Teaching Hospital, Kaposvar, Hungary.
7 Department of Clinical Hematology, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic.
8 Department of Hematology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.
9 Department of Hematology, Regional Treatment and Diagnostics Hematology Centre, Cherkasy Regional Oncology Centre, Cherkasy, Ukraine.
10 First Department of Internal Medicine, Multiprofile Hospital for Active Treatment - HristoBotev, Vratsa, Bulgaria.
11 Clinic of Internal Medicine - Hematology and Oncology, University Hospital Brno, Brno, Czech Republic.
12 Department of Hematology, Yaroslavl Regional Clinical Hospital, Yaroslavl, Russia.
13 Department of Hematology, Zealand University Hospital, Roskilde, University of Copenhagen, Copenhagen, Denmark.
14 Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria.
15 Université de Paris, AP-HP, Hôpital Saint-Louis, Centre d'Investigations Cliniques, INSERM, CIC1427, Paris, France.