1. Senckenberg Institute of PathologyGoethe University Frankfurt am Main Germany
2. Reference and Consultation Center for Lymph Node and Lymphoma PathologyGoethe University Frankfurt am Main Germany
3. First Department of Internal MedicineCenter for Integrated Oncology Aachen Bonn Cologne Dusseldorf, University of Cologne Cologne Germany
4. German Hodgkin Study GroupUniversity Hospital Cologne Cologne Germany
5. Institute of PathologyUniversity of Würzburg and Comprehensive Cancer Center (CCC) Mainfranken Würzburg Germany
6. Institute of Human GeneticsUlm University and Ulm University Medical Center Ulm Germany
7. Hematopathology Lübeck Lübeck Germany
8. Department of Clinical PathologyRobert‐Bosch‐Krankenhaus and Dr Margarete Fischer‐Bosch Institute of Clinical Pharmacology Stuttgart Germany
9. Institute of PathologyKantonsspital St. Gallen St. Gallen Switzerland
10. Institute of PathologyEberhard Karls University Tübingen Tübingen Germany
11. Pathodiagnostic Berlin, Berlin Reference Center for Lymphoma and Hematopathology Berlin Germany
12. Institute of Pathology, Hematopathology Section and Lymph Node RegistryUniversity Hospital Schleswig‐Holstein Campus Kiel Kiel Germany
13. Institute of PathologyUniversity Hospital Ulm Ulm Germany
14. Frankfurt Institute of Advanced Studies Frankfurt am Main Germany