1. Department of Physiology, Wonkwang University College of Medicine, Iksan, South Korea
2. Department of Clinical Neurophysiology, University Medical Center, Georg-August-University, Goettingen, Germany
3. Leibniz Research Center for Working Environment and Human Factors, Dortmund, Germany
4. Department of Neurology, BG University Hospital Bergmannsheil, Ruhr-University Bochum, Germany
5. Department of Physical and Rehabilitation Medicine, Center for Prevention and Rehabilitation, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
6. Department of Rehabilitation Medicine, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, South Korea