1. Department of Anatomy Kawasaki Medical School Kurashiki Okayama Japan
2. Department of Medical Technology, Faculty of Health Science and Technology Kawasaki University of Medical Welfare Kurashiki Okayama Japan
3. Research Center for Ultra‐High Voltage Electron Microscopy Osaka University Osaka Japan
4. Division of Cerebral Circuitry National Institute for Physiological Sciences Okazaki Aichi Japan
5. Department of Cell Biology and Neuroscience Juntendo University Graduate School of Medicine Tokyo Japan
6. Department of Oral Anatomy and Neurobiology Osaka University Graduate School of Dentistry Osaka Japan