1. Department of Diagnostic Radiology; Positron Emission Tomography Center; Yale University School of Medicine; New Haven; Connecticut
2. Mood and Anxiety Disorders Program; Department of Psychiatry; Mount Sinai School of Medicine; New York; New York
3. Experimental Therapeutics; Mood and Anxiety Disorders Program; Division of Intramural Research Programs ; National Institute of Mental Health; Bethesda; Maryland
4. Department of Psychiatry; Yale University School of Medicine; New Haven; Connecticut
5. Molecular Imaging Program; Department of Psychiatry and Radiology; New York University School of Medicine; New York; New York