*Columbia University College of Physicians and Surgeons

‡Autism Speaks, New York

†Cohen Childrens Hospital, New Hyde Park, NY

§Ann & Robert H. Lurie Childrens Hospital of Chicago, Chicago, IL

∥Harvard Medical School, Boston, MA

The authors have no funding or conflicts of interest to disclose.

Address correspondence to: William M. Jackson, MD, MS. E-mail: [email protected].