1. Mass Spectrometry Research Center, Korea Basic Science Institute, Ochang, Republic of Korea
2. Mass Spectrometry Research Center, Korea Basic Science Institute, Ochang, Republic of Korea and Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon, Republic of Korea
3. Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon, Republic of Korea
4. Department of Neurosurgery, Bundang CHA Medical Center, CHA University, Seongnam, Republic of Korea