[1] Yale Univ, Dept Med, New Haven, CT 06520 USA
[2] Inst Psychiat, Dept Psychosis Studies, London, England
[3] Sheba Med Ctr, Div Psychiat, Ramat Gan, Israel
[4] NIMH, Intramural Res Program, NIH, Clin Brain Disorders Branch,Genes Cognit & Psycho, Bethesda, MD 20892 USA
[5] Maryland Psychiat Res Ctr, Dept Psychiat, Baltimore, MD 21228 USA