1 Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, Taipei, Taiwan. kvchang011@gmail.com.
2 Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, BeiHu Branch and National Taiwan University College of Medicine, Taipei, Taiwan. wwtaustin@yahoo.com.tw.
3 Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey. lozcakar@yahoo.com.