1. Department of Microbiology, Chungnam National University School of Medicine, Daejeon 35015, Republic of Korea
2. Department of Medical Science, Chungnam National University School of Medicine, Daejeon 35015, Republic of Korea
3. Brain Korea 21 FOUR Project for Medical Science, Chungnam National University, Daejeon 34134, Republic of Korea
4. Research Institute for Medical Sciences, College of Medicine, Chungnam National University, Daejeon 34134, Republic of Korea