1. Gordon Center for Medical Imaging & Nuclear Medicine and Molecular Imaging Massachusetts General Hospital & Department of Radiology Harvard Medical School Boston MA 02114 USA
2. Pfizer Worldwide Research and Development, Groton Laboratories Eastern Point Road Groton CT 06340 USA
3. Pfizer Worldwide Research and Development 610 Main Street Cambridge MA 02139 USA
4. Departments of Neurology & Psychiatry Massachusetts General Hospital Harvard Medical School 185 Cambridge Street Boston MA 02114 USA
5. Stanley Center for Psychiatric Research Broad Institute 415 Main Street Cambridge MA o2142 USA