1. Department of Medicine (Cardiology), Research Center for Metabolic Disease, Tokai University School of Medicine and Tokai University Graduate School of Medicine, Isehara, Japan
2. Department of Health and Nutrition, Niigata University of Health and Welfare, Niigata, Japan
3. Department of Bio-engineering, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan
4. Department of Mechanical Science and Bioengineering, Osaka University School of Engineering Science, Osaka, Japan