1 Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital, Linkou, Tao-Yuan County, Taiwan; and College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan County, Taiwan; John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, Hawaii; and Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University School of Medicine, Richmond, Virginia; Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital, Linkou, Tao-Yuan County, Taiwan; and College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan County, Taiwan; Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Linkou, Tao-Yuan County, Taiwan; and College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan County, Taiwan.