[1] Kyoto Univ, Grad Sch Med, Dept Pharmacol, Kyoto, Japan
[2] Natl Inst Physiol Sci, Support Ctr Brain Res, Sect Electron Microscopy, Okazaki, Japan
[3] Grad Univ Adv Studies SOKENDAI, Okazaki, Japan
[4] RIKEN Ctr Brain Sci, Res Resources Div, Support Unit Electron Microscopy Tech, Wako, Japan
[5] Kyushu Univ, Inst Adv Study, Med Inst Bioregulat, Div Mol Syst Brain Funct, Fukuoka, Japan
[6] Japan Sci & Technol Agcy, PRESTO, Saitama, Japan