1. Biomaterials and Tissue Engineering Lab, Department of Nanobiomedical Science & WCU Research Center, Dankook University, Cheonan, South Korea.
2. Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, South Korea.
3. Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, South Korea.
4. Department of Biochemical Engineering, University College London, London, United Kingdom.