1. *Department of Pathology, Ludwig-Maximillians-Universität, D-80337 München, †Department of Pathology, Friedrich-Alexander Universität Erlangen-Nürnberg, D-91054, ‡Institute of Medical Microbiology and Hygiene, University, D-93053 Regensburg and §Department of Diagnostic Radiology, Ludwig-Maximilians-Universität, D-80336 München, Germany