1. Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, United States
2. School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, China
3. Department of Radiopharmaceuticals Development, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
4. Department of Pharmacology and Clinical Neuroscience, Umeå University, SE-901 87 Umeå, Sweden
5. The Skaggs Institute for Chemical Biology and Department of Chemical Physiology, The Scripps Research Institute, SR107 10550 North Torrey Pines Road, La Jolla, California 92037, United States
6. Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
7. Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan