1. Department of Business Administration, School of Business, Yeungnam University, Gyeongsan, Korea.
2. Department of Rehabilitation Medicine, College of Medicine, Yeungnam University, Daegu, Korea.
3. Department of Information and Communication Engineering, Yeungnam University, Gyeongsan, Korea.
4. Department of Physical Medicine and Rehabilitation, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.