1. Department of Regenerative Medicine, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea.
2. Institute of Tissue Regeneration, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea.
3. Department of Physiology, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea.
4. Division of Environmental Material Engineering, Department of Forest Products, Korea Forest Research Institute, Seoul, Republic of Korea.