[1] VANDERBILT UNIV, SCH MED, NEUROPSYCHIAT INST, DEPT PSYCHIAT, NASHVILLE, TN 37203 USA
[2] VANDERBILT UNIV, SCH MED, NEUROPSYCHIAT INST, DEPT PHARMACOL, NASHVILLE, TN 37203 USA
[3] NIMH, LAB CLIN SCI, BETHESDA, MD 20014 USA
[4] UNIV CALIF, DEPT MED, DIV CARDIOL, LOS ANGELES, CA 90024 USA