1. Charles University; Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry; Albertov 6 CZ-12843 Prague 2 Czech Republic
2. University of Veterinary and Pharmaceutical Sciences; Faculty of Pharmacy, Department of Chemical Drugs; Palackého 1/3 CZ-61242 Brno Czech Republic
3. Comenius University; Faculty of Pharmacy; Department of Pharmaceutical Chemistry; Odbojárov 10 SK-83232 Bratislava Slovakia
4. Institute of Biophysics of the Czech Academy of Sciences; Královopolská 135 CZ-61265 Brno Czech Republic