1. Department of Electrical Engineering and Information Systems; Graduate School of Engineering; University of Tokyo; Tokyo Japan
2. Department of Neuromodulation and Neurosurgery; Graduate School of Medicine; Osaka University; Suita Japan
3. Department of Advanced Energy; Graduate School of Frontier Sciences; University of Tokyo; Kashiwa Japan
4. Home Healthcare Research and Development Planning Department; Teijin Pharma Limited; Tokyo Japan
5. Department of Civil, Environmental and Applied System Engineering; Faculty of Environmental Urban Engineering, Kansai University; Suita Japan
6. Bioengineering Course; Division of Mechanical Engineering and Robotics; Faculty of Textile Science and Technology; Shinshu University; Ueda Japan