1. A.J. Drexel Autism Institute, Drexel University; Philadelphia PA
2. Center for Autism Research and Treatment, UCLA; Los Angeles CA
3. University of Manchester; Manchester UK
4. Center for Mental Health Policy and Services Research, University of Pennsylvania; Philadelphia PA
5. University of Massachusetts; Boston MA
6. Victorian Autism Specific Early Learning and Care Centre; and Olga Tennison Autism Research Centre, La Trobe University; Melbourne Australia