1. Department of Medicine I, Wilhelminenspital, Vienna, Austria;
2. Department of Internal Medicine, Hospital Elisabethinen, Linz, Austria;
3. Department of Hematology, Medical University, Graz, Austria;
4. Department of Internal Medicine III, Hospital Salzburg, Salzburg, Austria;
5. Department of Hemato-oncology, Hanusch Krankenhaus, Vienna, Austria; and
6. University Hospital, Brno, Czech Republic