1. Institute of Physiology I (Neurophysiology), Wesfälische Wilhelms University, Münster, Germany.
2. Donders Centre for Cognition, Radboud University, Nijmegen, The Netherlands.
3. Saratov State University, Saratov, Russia.
4. Saratov Branch of Kotel'nikov Institute of Radio Engineering and Electronics of RAS, Saratov, Russia.