[1] Harvard Univ, McLean Hosp, Sch Med, Belmont, MA 02178 USA
[2] Univ N Carolina, Dept Psychiat, Chapel Hill, NC USA
[3] Eli Lilly & Co, Lilly Res Labs, Indianapolis, IN 46285 USA
[4] Stanford Univ, Sch Med, Dept Psychiat, Stanford, CA 94305 USA
[5] John Umstead Hosp, Butner, NC USA
[6] Stonehouse Hosp, Clin Neurosci Res Ctr, Dartford, Kent, England
[7] Univ Toronto, Dept Psychiat, Toronto, ON, Canada
[8] Univ Utrecht, Med Ctr, Dept Psychiat, Utrecht, Netherlands
[9] Univ Penn, Neuropsychiat Sect, Philadelphia, PA 19104 USA
[10] Emory Univ, Sch Med, Dept Psychiat & Behav Sci, Atlanta, GA USA
[11] Univ Massachusetts, Sch Med, Ctr Psychopharmacol Res & Treatment, Worcester, MA USA
[12] Univ Cincinnati, Coll Med, Dept Psychiat, Cincinnati, OH USA