1. Department of Nuclear Medicine and Tracer Kinetics, Graduate School of Medicine, Osaka University, Suita, Japan
2. Institute for Radiation Sciences, Osaka University, Suita, Japan
3. Core for Medicine and Science Collaborative Research and Education, Project Research Center for Fundamental Sciences, Graduate School of Science, Osaka University, Toyonaka, Japan
4. Department of Molecular Imaging in Medicine, Graduate School of Medicine, Osaka University, Suita, Japan
5. Research Center for Nuclear Physics, Osaka University, Ibaraki, Japan
6. Department of Bio-system Pharmacology, Graduate School of Medicine, Osaka University, Suita, Japan
7. Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Japan