1. Department of Pathology, Otto-von-Guericke-University, Magdeburg, Germany
2. Imassense Deutschland, Berlin, Germany
3. Institute of Pathology and Neuropathology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
4. Department of Ophthalmology, Martin-Luther-University, Halle, Germany
5. Medical Computer Center, Otto-von-Guericke-University, Magdeburg, Germany