1. Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan.
2. Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan City, Taiwan.
3. Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Taoyuan, Taoyuan City, Taiwan.
4. Department of Mechanical Engineering, Chang Gung University, Taoyuan City, Taiwan.
5. College of Medicine, Chang Gung University, Taoyuan City, Taiwan.