1. Stanford University,Dept. of Electrical Engineering,Stanford,USA
2. Stanford University,Dept. of Mechanical Engineering,Stanford,USA
3. National Institutes of Health,Dept. of Rehabilitation Medicine,Bethesda,USA
4. National Institutes of Health,Complementary and Integrative Health,Bethesda,USA
5. National Institutes of Health,Neurological Disorders and Stroke,Bethesda,USA