1. Department of Physical Medicine and Rehabilitation; Taipei Veterans General Hospital; No. 201, Section 2, Shih-Pai Road, Beitou District Taipei City, 11217 Taiwan
2. Department of Physical Medicine & Rehabilitation; National Yang Ming University; Taipei Taiwan
3. Department of Neurology; Taipei Veterans General Hospital; Taipei Taiwan
4. Department of Neurology; National Yang-Ming University School of Medicine; Taipei Taiwan
5. Department of Mathematics; Tamkang University; Tamsui Taiwan
6. Division of General Surgery, Department of Surgery; Shin-Kong Memorial Hospital; Taipei Taiwan