1. Azrieli Centre for Neuro-Radiochemistry, Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario M5T 1R8, Canada
2. Department of Psychiatry/Institute of Medical Science, University of Toronto, Toronto, Ontario M5T 1R8, Canada
3. Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital and Department of Radiology, Harvard Medical School, Boston, Massachusetts 02114, United States
4. Division of Nuclear Medicine, Department of Radiology, The University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
5. Eisai AiM Institute, Boston, Massachusetts 01810, United States
6. Chemical Neurobiology Laboratory, Massachusetts General Hospital, Center for Genomic Medicine, Departments of Neurology & Psychiatry, Harvard Medical School, Boston, Massachusetts 02114, United States
7. Pfizer Worldwide Research and Development, Groton Laboratories, Eastern Point Road, Groton, Connecticut 06340, United States
8. Biogen, Research and Early Development Imaging, Cambridge, Massachusetts 02142, United States
9. Invicro, London W12 0NN, U.K.
10. The Interdepartmental Program in Medicinal Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States