1. Crop Research Institute Prague Czech Republic
2. Institute of Microbiology, Czech Academy of Sciences Prague Czech Republic
3. Department of Biology, Faculty of Science J. E. Purkyně University in Ústí nad Labem Ústí nad Labem Czech Republic
4. Department of Natural Resource Ecology and Management Oklahoma State University Stillwater Oklahoma USA
5. Kansas Biological Survey and Center for Ecological Research Lawrence Kansas USA
6. Third Faculty of Medicine Charles University Prague Czech Republic