1. Dale E. and Sarah Ann Fowler School of Engineering, Chapman University, Orange, CA, USA
2. Department of Physical Therapy, Crean College of Health and Behavioral Sciences, Chapman University, Irvine, CA, USA
3. College of Health, Arts and Sciences, Oregon Institute of Technology, Klamath Falls, OR, USA
4. School of Information Engineering, Yancheng Teachers University, Yancheng, Jiangsu, China