1. Department of Physiology, Faculty of Medicine; University of Fribourg; Chemin du Musee 5; Fribourg; CH1700; Switzerland
2. Department of Analytical Chemistry, Faculty of Science; Palacky University Olomouc; 17. Listopadu 12; Olomouc; CZ77146; Czech Republic
3. Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science; Palacky University; Slechtitelu 11; 78371; Olomouc; Czech Republic