1. 1Laboratory of Medical Immunology, Department of Immunology, Erasmus MC, University Medical Centre Rotterdam, Rotterdam, The Netherlands
2. 2Department of Internal Medicine, Albert Schweitzer Hospital, Dordrecht, The Netherlands
3. 3Department of Hematology, Pitié-Salpêtrière Hospital, University of Paris, Paris, France
4. 4Department of Hematology, Erasmus MC, University Medical Centre Rotterdam, Rotterdam, The Netherlands
5. 5Department of Clinical Chemistry, Erasmus MC, University Medical Centre Rotterdam, Rotterdam, The Netherlands
6. 6Faculty of Medicine and University Hospital Cologne, Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, University of Cologne, Cologne, Germany
7. 7Department of Medicine II, University Hospital of Schleswig Holstein, Campus Kiel, Kiel, Germany
8. 8Division of Oncogeriatrics, St Marien Hospital, Cologne, Germany