1. Department of Biomedical Science, College of Life Sciences, CHA University, Seongnam 13496, Republic of Korea
2. ATEMs Inc., Seoul 02447, Republic of Korea
3. Department of Neurosurgery, Kyung Hee University, Dongdaemun-gu, Seoul 02447, Republic of Korea
4. Wake Forest Institute of Regenerative Medicine, School of Medicine, Wake Forest University, Winston Salem, NC 27101, USA
5. Department of Biomedical Sciences, Inha University College of Medicine, Incheon 22212, Republic of Korea
6. Department of Neurosurgery, CHA Bundang Medical Center, School of Medicine, CHA University, Seongnam 13496, Republic of Korea