[1] UNIV CALIF LOS ANGELES, SCH MED,BRAIN RES INST,MENTAL RETARDAT RES CTR, DEPT ANAT & CELL BIOL, LOS ANGELES, CA 90024 USA
[2] UNIV CALIF LOS ANGELES, SCH MED,BRAIN RES INST,MENTAL RETARDAT RES CTR, DEPT PSYCHIAT, LOS ANGELES, CA 90024 USA
[3] UNIV CALIF LOS ANGELES, BIOMED & ENVIRONM HLTH SCI LAB, LOS ANGELES, CA 90024 USA