[1] Univ Calif Los Angeles, Ctr Neurobehav Genet, Semel Inst Neurosci & Human Behav, Dept Psychiat, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Ctr Neurobehav Genet, Semel Inst Neurosci & Human Behav, Dept Human Genet, Los Angeles, CA 90095 USA
[3] Univ Calif Los Angeles, Dept Stat, Los Angeles, CA 90095 USA