1. Department of Physical Medicine and Rehabilitation, Lo-Hsu Medical Foundation, Inc, Lotung Poh-Ai Hospital, Yilan, Taiwan
2. Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
3. Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, Taipei, Taiwan
4. Center for Regional Anesthesia and Pain Medicine, Wang-Fang Hospital, Taipei Medical University, Taipei, Taiwan
5. Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey