1. Department of Physiology, Osaka City University Graduate School of Medicine, Abeno-ku, Osaka, Japan
2. PIP Co., Ltd., Chuo-ku, Osaka, Japan
3. ROBOLUTION Co., Ltd., Takasago, Osaka, Japan
4. Department of Physiology, Osaka City University Graduate School of Medicine, Abeno-ku, Osaka, Japan and Center for Molecular Imaging Science, RIKEN, Chuo-ku, Hyogo, Japan