William T Carpenter1, Darrel Regier2, Rajiv Tandon3. 1. Department of Psychiatry, Maryland Psychiatric Research Center, Catonsville, MD 21228, USA. 2. Division of Research, American Psychiatric Association, Arlington, VA 22209, USA. 3. Department of Psychiatry, University of Florida College of Medicine, Gainesville, FL 32308, USA. Electronic address: tandon@ufl.edu.