1. Dr. Senckenberg Institute of Pathology, Goethe University, Frankfurt am Main, Germany;
2. First Department of Internal Medicine and
3. German Hodgkin Study Group, University Hospital of Cologne, Germany;
4. Institute of Pathology, University of Würzburg and Comprehensive Cancer Center (CCC) Mainfranken, Germany;
5. Pathodiagnostic Berlin, Berlin Reference Center for Lymphoma and Hematopathology, Berlin, Germany;
6. Institute of Pathology, Haematopathology Section and Lymph Node Registry, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Germany;
7. Institute of Pathology, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Germany;
8. Institute of Pathology, Kantonsspital St. Gallen, Switzerland;
9. Institute of Pathology, Charité University Hospital, Berlin, Germany;
10. Department of Clinical Pathology, Robert-Bosch-Krankenhaus and Dr Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany; and
11. Institute of Pathology, University Hospital Ulm, Germany