1. Division of Special Care Dentistry Osaka University Dental Hospital Suita Osaka Japan
2. Division of System Neuroscience Kobe University Graduate School of Medicine Kobe Hyogo Japan
3. Department of Oral Physiology Osaka University Graduate School of Dentistry Suita Osaka Japan
4. Department of Child Neuropsychiatry, Graduate School of Medicine University of Tokyo Bunkyo‐ku Tokyo Japan
5. Systems Neuroscience Section, Primate Research Institute Kyoto University Inuyama Aichi Japan
6. Division of System Neurophysiology, National Institute for Physiological Sciences, and Department of Physiological Sciences SOKENDAI (The Graduate University for Advanced Studies) Okazaki Aichi Japan
7. Department of Oral Anatomy and Neurobiology Osaka University Graduate School of Dentistry Suita Osaka Japan