1 Division of Oncology, Department of Internal Medicine, Department of Internal Medicine, Medical University of Graz, Graz, Austria. Electronic address: florian.posch@medunigraz.at.
2 Division of Haematology, Department of Internal Medicine, Medical University of Graz, Graz, Austria.
3 Clinical Division of Haematology and Haemostaseology, Department of Medicine I, Medical University of Vienna, Comprehensive Cancer Centre Vienna, Vienna, Austria.