1. Department of General Zoology; Faculty of Biology, University of Duisburg-Essen; Essen Germany
2. Department of Game Management and Wildlife Biology, Faculty of Forestry and Wood Sciences; Czech University of Life Sciences; Praha 6 Czech Republic
3. Max Planck Institute for Brain Research; Frankfurt am Main Germany
4. Institute of Cellular and Molecular Anatomy, Dr. Senckenbergische Anatomie, Goethe University Frankfurt; Frankfurt am Main Germany