[1] Washington VA Med Ctr, Washington, DC USA
[2] Georgetown Univ, Sch Med, Dept Psychiat, Washington, DC 20057 USA
[3] Virginia Commonwealth Univ, Dept Psychiat, Richmond, VA 23284 USA
[4] Virginia Commonwealth Univ, Dept Human Genet, Richmond, VA 23284 USA
[5] NIMH, Genes Cognit & Psychosis Program, Bethesda, MD USA
[6] Hlth Res Board, Dublin, Ireland
[7] Queens Univ Belfast, Belfast, Antrim, North Ireland