1. Department of Physiology, College of Medicine, Hallym University, Chuncheon 24252, Republic of Korea
2. Institute of Sport Science, Hallym University, Chuncheon 24252, Republic of Korea
3. Department of Physical Education, Hallym University, Chuncheon 24252, Republic of Korea
4. Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
5. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
6. Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA