1. Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, Germany
2. First Department of Internal Medicine, Center for Integrated Oncology Aachen–Bonn–Cologne–Düsseldorf (CIO ABCD), Faculty of Medicine and University Hospital Cologne, University of Cologne, Germany
3. Cologne Essen Lymphoma Working Group (CLWG), Cologne and Essen, Germany
4. Department of Nuclear Medicine, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
5. Department of Medicine A—Hematology, Oncology, and Pneumology, West German Cancer Center (WTZ), University Hospital Münster, University of Münster, Germany
6. Department of Nuclear Medicine, University Hospital Münster, University of Münster, Germany
7. Department of Hematology and Stem Cell Transplantation, West German Cancer Center (WTZ), University Hospital Essen, University of Duisburg-Essen, Essen, Germany
8. Institute for Medical Informatics, Biometry, and Epidemiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany