1 Department of Pathology, Hematopathology Section and Lymph Node Registry, University Hospital Schleswig-Holstein, Campus Kiel wklapper@path.uni-kiel.de.
2 Department of Pathology, Hematopathology Section and Lymph Node Registry, University Hospital Schleswig-Holstein, Campus Kiel.
3 Department of Internal Medicine III, University Hospital of Munich, Munich.
4 Department of Hematology, Oncology and Stem Cell Transplantation, Asklepios Hospital St Georg, Hamburg, Germany.