1. Department of Physical Medicine and Rehabilitation, Taipei Veterans General Hospital, Taipei, Taiwan
2. Department of Physical Medicine and Rehabilitation, West Garden Hospital, Taipei, Taiwan
3. Department of Physical Medicine and Rehabilitation Medicine, National Taiwan University Hospital Beihu Branch, Taipei, Taiwan
4. Divison of General Surgery, Department of Surgery, Shin-Kong Memorial Hospital, Taipei, Taiwan
5. School of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan
6. School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan