University Hospital Hannover, Carl-Neuberg-Strasse 1, Hannover D-30625, Germany; E-Mail: Abbas.Mahmoud@mh-hannover.de 6 Institute of Pathology, Klinikum Osnabrueck, Am Finkenhuegel 1, Osnabrueck D-49076, Germany; E-Mail: joerg.neumann@pathomail.de 7 Institute of Pathology, Saarbrücken-Rastpfuhl...