1. Department of Applied Bioscience, CHA University, Seoul, Korea.
2. Stem Cell Research Laboratory, CHA Stem Cell Institute, Seoul, Korea.
3. CHA Bio & Diostech Co., Ltd., Seoul, Korea.
4. Department of Biomedical Science, CHA University, Seoul, Korea.
5. College of Life Sciences and Biotechnology, Korea University, Seoul, Korea.
6. The Vivian L. Smith Department of Neurosurgery, The University of Texas Medical School at Houston, Houston, Texas.