1. Institute of Electrical and Biomedical Engineering, UMIT-Private University for Health Sciences, Medical Informatics and Technology, Eduard-Wallnoefer-Zentrum 1, 6060 Hall in Tirol, Austria
2. Department of Neurology, Hochzirl Hospital, Zirl, Austria
3. Institute of Biomedical Engineering and Informatics, Technische Universitaet Ilmenau, Ilmenau, Germany