1 Laboratory of Computer Assisted Medicine, Division of Medical Engineering, Department of Electrical Engineering, Medical Engineering and Computer Science, Offenburg University, Badstr. 24, D-77652 Offenburg, Germany; Laboratory of NeuroScience, Division of Medical Engineering, Department of Electrical Engineering, Medical Engineering and Computer Science, Offenburg University, Badstr. 24, D-77652 Offenburg, Germany.
2 Clinical Neurotechnology Laboratory, Neuroscience Research Center (NWFZ), University Hospital of Psychiatry and Psychotherapy (CCM), Charité - University Medicine Berlin, Charitéplatz 1, D-10117 Berlin, Germany.
3 Laboratory of Computer Assisted Medicine, Division of Medical Engineering, Department of Electrical Engineering, Medical Engineering and Computer Science, Offenburg University, Badstr. 24, D-77652 Offenburg, Germany.
4 Laboratory of NeuroScience, Division of Medical Engineering, Department of Electrical Engineering, Medical Engineering and Computer Science, Offenburg University, Badstr. 24, D-77652 Offenburg, Germany. Electronic address: andreas.otte@hs-offenburg.de.