1. Department of Anatomy, College of Medicine, Chosun University, Gwangju, Korea.
2. Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Korea.
3. Department of Rehabilitation Medicine, Wonju Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea.
4. Department of Neurosurgery, College of Medicine, Chosun University, Gwangju, Korea.