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Programmed cell death protein1 (PD1)-expression in the microenvironment of classical Hodgkin lymphoma at relapse after conventional chemotherapy and at relapse on anti-PD1 treatment

First Department of Internal Medicine and German Hodgkin Study Group, University Hospital of Cologne, Germany
Department of Pathology, Hematopathology Section, University Hospital Schleswig-Holstein, Christian-Albrechts-University, Kiel, Germany
Department of Pathology and Medical Biology, University of Groningen, University Medical Centre Groningen, the Netherlands
First Department of Internal Medicine and German Hodgkin Study Group, University Hospital of Cologne, Germany;Center for Molecular Medicine, University Hospital of Cologne, Germany;Else Kröner Forschungskolleg Cologne, University of Cologne, Germany
Department of Pathology, Hematopathology Section, University Hospital Schleswig-Holstein, Christian-Albrechts-University, Kiel, Germany
Department of Pathology, Hematopathology Section, University Hospital Schleswig-Holstein, Christian-Albrechts-University, Kiel, Germany
First Department of Internal Medicine and German Hodgkin Study Group, University Hospital of Cologne, Germany
First Department of Internal Medicine and German Hodgkin Study Group, University Hospital of Cologne, Germany
Department of Pathology, Hematopathology Section, University Hospital Schleswig-Holstein, Christian-Albrechts-University, Kiel, Germany
Vol. 104 No. 1 (2019): January, 2019 https://doi.org/10.3324/haematol.2018.207829