1. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
2. University of Veterinary and Pharmaceutical Sciences, Faculty of Pharmacy, Department of Pharmaceutics, Palackeho tr. 1946/1, 612 42 Brno, Czech Republic
3. Department of Biochemistry, Faculty of Science, Masaryk University, Kotlářská 267/2, 611 37, Brno, Czech Republic
4. Department of Chemistry and Toxicology, Veterinary Research Institute, Hudcova 296/70, 621 00, Brno, Czech Republic