1. Department of Neurosurgery, School of Medicine, Ajou University, Suwon, Republic of Korea
2. Department of Physical Therapy, Graduate School of Rehabilitation Science, Yonsei University, Wonju, Republic of Korea
3. Physical Therapy Program, Hampton University, Hampton, VA USA
4. Department of Neurosurgery, School of Medicine, Yeungnam University, Taegu, Republic of Korea
5. Department of Physical Medicine and Rehabilitation, School of Medicine, Yeungnam University, Taegu, Republic of Korea
6. Department of Diagnostic Radiology, School of Medicine, Yeungnam University, Taegu, Republic of Korea