1 Institute of Pathology, Charité - Universitätsmedizin Berlin, Virchoweg 15 / Charitéplatz 1, 10117, Berlin, Germany. alexander.arnold@charite.de.
2 Institute of Pathology, Charité - Universitätsmedizin Berlin, Virchoweg 15 / Charitéplatz 1, 10117, Berlin, Germany.
3 Department of Applied Tumor Biology, Institute of Pathology, University of Heidelberg; Clinical Cooperation Unit Applied Tumor Biology, German Cancer Research Center (DKFZ); Molecular Medicine Partnership Unit (MMPU), University Hospital Heidelberg, Heidelberg, Germany.
4 Department of General Pathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.
5 Present address: Institute of Pathology, Universitätsklinikum Leipzig, Leipzig, Germany.