1. Department of Pediatrics, Emory University School of Medicine
2. College of Education, University of North Texas, TX, USA
3. Department of Psychiatry, Johns Hopkins University School of Medicine, Kennedy Krieger Institute, Baltimore, Maryland, USA
4. AJ Drexel Autism Institute, Drexel University, Philadelphia, PA, USA
5. Department of Psychology, Michigan State University, East Lansing, USA
6. Department of Psychology, California State University at San Marcos, Child and Adolescent Services Research Center, San Marcos, CA, USA
7. Waisman Center, University of Wisconsin-Madison, Madison, WI, USA
8. Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia. PA, USA
9. School of Education, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
10. Emma Eccles Jones College of Education and Human Services, Utah State University, Logan, UT, USA
11. Early Days Autism Center, Inc., Dorado Hills, CA, USA
12. Marcus Autism Center, Children’s Healthcare of Atlanta, Atlanta, GA, USA
13. Sandra Dunagan Deal Center for Early Language and Literacy, Georgia College & State University, Georgia