1. Department of Biological Sciences, KAIST, Daejeon 34141, Republic of Korea.
2. Department of Physiology, Seoul National University College of Medicine, Seoul, Republic of Korea.
3. Biological Electron Microscopy Facility, Centre of Electron Microscopy, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
4. Center for Synaptic Brain Dysfunctions, Institute for Basic Science and Department of Biological Sciences, KAIST, Daejeon 34141, Republic of Korea.
5. Brain Mind Institute, Faculty of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.