1. Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
2. Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
3. National Center for Geriatrics and Gerontology, Aichi, Japan
4. Department of Neuroscience, Mayo Clinic, Jacksonville, USA
5. Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Canada
6. Department of Psychiatry, Nara Medical University, Nara, Japan
7. Department of Psychology, Keio University, Tokyo, Japan
8. Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, Kyoto, Japan
9. Department of Psychiatry, Japanese Red Cross Ashikaga Hospital, Ashikaga, Tochigi, Japan
10. Department of Radiopharmaceuticals Development, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan