1. Department of Anesthesiology, Faculty of Medicine, University of Toyama, Toyama 930-0194, Japan
2. Department of System Emotional Science, Faculty of Medicine, University of Toyama, Toyama 930-0194, Japan
3. Department of Physiology, School of Bio-medicine, Mongolian National University of Medical Sciences, Ulaanbaatar 14210, Mongolia
4. Graduate School of Innovative Life Science, University of Toyama, Toyama 930-0194, Japan
5. Research Center for Idling Brain Science (RCIBS), University of Toyama, Toyama 930-0194, Japan