1. 1Third Faculty of Medicine, Charles University, Ruská 87, Prague 10, 100 00, Czech Republic
2. 2Center for Neuroscience, University of California, Davis, 1 Shields Ave, Davis, CA 95618, USA
3. 3Department of Psychology, University of California, Davis, 1 Shields Ave, Davis, CA 95618, USA
4. 4Department of Psychology, University of Arizona, 1503 E. University Blvd., Tucson, AZ 85719, USA