1. Department of Rehabilitation Medicine, Dankook University College of Medicine, Cheonan, Korea.
2. Department of Neurology, Dankook University College of Medicine, Cheonan, Korea.
3. WCU Research Center of Nanobiomedical Science, Dankook University, Cheonan, Korea.
4. Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, Korea.