1. Department of Physical Therapy and Graduate Institute of Rehabilitation Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
2. Department of Electrical Engineering, College of Engineering, Chang Gung University, Taoyuan, Taiwan
3. Healthy Aging Research Center, Chang Gung University, Taoyuan, Taiwan
4. Department of Mechanical Engineering and Graduate Institute of Medical Mechatronics, College of Engineering, Chang Gung University, Taoyuan, Taiwan
5. National Keelung Special Education School, Keelung, Taiwan
6. Division of Physical Therapy, Department of Physical Medicine and Rehabilitation, Chiayi Chang Gung Memorial Hosipital, Chiayi, Puzi, Taiwan