1. Department of Applied Bioscience, CHA University, Seoul, Korea.
2. Stem Cell Research Laboratory, CHA Stem Cell Institute, Seoul, Korea.
3. Department of Plastic & Reconstructive Surgery, Bundang CHA Medical Center, CHA University, Seongnam-si, Kyunggi-do, Korea.
4. Department of Biomedical Science, CHA University, Seoul, Korea.
5. Clinical Research Center, Inha University College of Medicine, Incheon, Korea.
6. The Vivian L. Smith Department of Neurosurgery, The University of Texas Medical School at Houston, Houston, Texas.