Hideto Takahashi1, Keiko Matsuda2, Katsuhiko Tabuchi3, Jaewon Ko4. 1. Synapse Development and Plasticity, Institut de Recherches Cliniques de Montréal (IRCM), Montreal, Quebec, H2W 1R7, Canada. Electronic address: Hideto.Takahashi@ircm.qc.ca. 2. Department of Neurophysiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, 160-8582, Japan. 3. Department of Molecular & Cellular Physiology, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto 390-8621, Japan; Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Matsumoto 390-8621, Japan. 4. Department of Brain and Cognitive Sciences, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Korea.