1. Institute of Physiology; The Czech Academy of Sciences; Prague Czech Republic
2. Department of Physiology; Faculty of Science; Charles University in Prague; Prague Czech Republic
3. Center for Experimental Medicine; Institute for Clinical and Experimental Medicine; Prague Czech Republic
4. Department of Cell Biology; Faculty of Science; Charles University in Prague; Prague Czech Republic
5. Department of Pharmacology & Toxicology; Medical College of Wisconsin; Milwaukee WI USA