1. Department of Physical Therapy, Medical School, Chang Gung University, Tao-Yuan, Taiwan;
2. Healthy Aging Research Center, Chang Gung University, Tao-Yuan, Taiwan;
3. Department of Exercise and Health Science, College of Human Development and Health, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan; and
4. Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital, Taipei, Taiwan