1. Department of Long-Term Care, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan
2. Department of Physical Medicine and Rehabilitation, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
3. School of Physical Therapy, College of Medicine, Chang Gung University, Taoyuan, Taiwan
4. Wisconsin Center of Education Research, University of Wisconsin Madison, Madison, WI, USA