1 Institute of Pathology and Molecular Pathology, Helios University Clinic Wuppertal, University of Witten/Herdecke, Witten, Germany; Institute of Functional and Clinical Anatomy, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany. Electronic address: maximilian.ackermann@uni-mainz.de.
2 Institute of Pathology, Hannover Medical School, Hannover, Germany.