Chen-Yu Hung1, Ke-Vin Chang2, Levent Özçakar3. 1. Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Chu-Tung Branch, Hsinchu, Taiwan. 2. Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, BeiHu Branch and National Taiwan University College of Medicine, Taipei, Taiwan. 3. Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey.