1. Institute of Cell Biology (Cancer Research), University of Duisburg-Essen Medical School, Essen, Germany;
2. Institute for Pathology, University of Frankfurt Medical School, Frankfurt, Germany;
3. Institute for Informatics, University of Frankfurt, Frankfurt, Germany;
4. Department of Pathology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands;
5. Institute for Pathology, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany;
6. Institute of Pathology, University of Heidelberg, Heidelberg, Germany; and
7. Institute of Hematology, University of Perugia, Perugia, Italy