1. Department of Psychiatry, University of California–Davis, Sacramento, California;
2. Department of Psychology, University of Massachusetts Boston, Boston, Massachusetts;
3. Department of Psychology, University of Miami, Miami, Florida;
4. Department of Psychology, Hebrew University of Jerusalem, Jerusalem, Israel;
5. Department of Pediatrics, University of Alberta, Alberta, Canada;
6. Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia, Canada;
7. Department of Psychology, University of California–San Diego, San Diego, California;
8. Department of Psychology, Washington University, St Louis, Missouri;
9. Department of Psychiatry and
10. Department of Psychology, University of Pittsburgh, Pittsburgh, Pennsylvania;
11. Center for Autism and Related Disorders (CARD), Kennedy Krieger Institute, Baltimore, Maryland; and
12. Division of Child and Adolescent Psychiatry Neuropsychiatric Institute and Hospital, University of California–Los Angeles, Los Angeles, California;
13. Department of Psychology, University of Washington, Seattle, Washington