1. Department of Plastic and Reconstructive Surgery and College of Medicine, Soonchunhyang University, Bucheon, Korea
2. Department of Plastic and Reconstructive Surgery and College of Medicine, Soonchunhyang University, Cheonan, Korea
3. Department of Neurosurgery, College of Medicine, Soonchunhyang University, Cheonan, Korea
4. Department of Pathology, College of Medicine, Soonchunhyang University, Cheonan, Korea
5. Institute of Tissue Regeneration, Soonchunhyang University, Cheonan, Korea