1. Institute of Cytopathology, Heinrich‐Heine‐University, Moorenstrasse 5, D‐40225 Düsseldorf, Germany
2. Institute of Pathology, Friedrich‐Wilhelms‐University, Regina‐Pacis‐Weg 3, D‐53113 Bonn, Germany
3. Department of Obstetrics and Gynecology, Karl‐Franzens‐University, Universitätsplatz 3, A‐8010 Graz, Austria