1. Institute for Pathology and Neuropathology, Eberhard Karls University, University Hospital of Tübingen, Tübingen 72076, Germany
2. Institute of Tropical Medicine, Eberhard Karls University, University Hospital of Tübingen, Tübingen 72074, Germany
3. Department of Clinical Epidemiology and Applied Biometry, University Hospital of Tübingen, Tübingen 72076, Germany