1. Laboratory of Human-Animal Interaction and Reciprocity, School of Veterinary Medicine, Azabu University, Kanagawa, Japan
2. Center for Human and Animal Symbiosis Science, Azabu University, Kanagawa, Japan
3. Department of Material Process Engineering, Nagoya University, Aichi, Japan
4. Department of Neuropharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Aichi, Japan
5. Department of Physiology, Dokkyo Medical University School of Medicine, Tochigi, Japan