1. School of Medicine, College of Medicine, National Cheng Kung University, Tainan 701401, Taiwan
2. Department of Physical Medicine and Rehabilitation, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704302, Taiwan
3. Department of Physical Medicine and Rehabilitation, College of Medicine, National Cheng Kung University, Tainan 701401, Taiwan