S. J. Webb¹, A. Naples², A. R. Levin³, G. Hellemann⁴, C. Sugar⁵, D. Senturk⁴, M. Santhosh⁶, H. M. Borland⁶, T. McAllister⁷, S. Hasselmo⁷, F. Shic⁶, M. Murias⁸, J. Dziura⁹, C. Brandt⁹, R. A. Bernier¹, K. Chawarska⁷, G. Dawson¹⁰, S. Faja¹¹, S. Jeste¹², C. A. Nelson¹³ and J. McPartland², (1)Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA, (2)Yale Child Study Center, Yale University School of Medicine, New Haven, CT, (3)Neurology, Boston Children's Hospital, Brookline, MA, (4)UCLA, Los Angeles, CA, (5)University of California, Los Angeles, Los Angeles, CA, (6)Center for Child Health, Behavior and Development, Seattle Children's Research Institute, Seattle, WA, (7)Child Study Center, Yale University School of Medicine, New Haven, CT, (8)Duke Center for Autism and Brain Development, Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, (9)Yale University, New Haven, CT, (10)Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, (11)Boston Children's Hospital, Boston, MA, (12)Children's Hospital Los Angeles, Los Angeles, CA, (13)Department of Developmental Medicine, Boston Children's Hospital, Boston, MA