[1] Univ Calif Los Angeles, Dept Pediat, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Dept Psychiat, Los Angeles, CA 90095 USA
[3] Univ Calif Los Angeles, Dept Human Genet, Los Angeles, CA 90095 USA
[4] Univ Autonoma Madrid, Ctr Diagnost Enfermedades Mol CEDEM, CIBERER, E-28049 Madrid, Spain
[5] Univ Calif San Diego, Dept Pediat, San Diego, CA 92103 USA