1. Departments of Population Health Sciences and Pediatricsand Waisman Center, University of Wisconsin‐Madison 789 WARF610 Walnut Street Madison Wisconsin
2. Department of PsychiatryMcGill University1033 Pine Avenue WestMontreal QuebecH3A 1A1 Canada
3. Olga Tennison Autism Research CentreSchool of Psychology and Public Health, College of Science, Health, and Engineering, La Trobe UniversityMelbourne Victoria3086 Australia
4. Department of Women and Children's HealthInstitute of Translational Medicine, University of Liverpool, Alder Hey Children's NHS Foundation TrustEaton RoadLiverpool United Kingdom
5. MRC SocialGenetic & Developmental Psychiatry Centre, Institute of Psychiatry, Psychology & Neuroscience (PO 80), King's College LondonDe Crespigny Park Denmark HillLondon United Kingdom
6. Department of Life Health & Chemical SciencesFaculty of Science, The Open University Walton HallMilton Keynes United Kingdom
7. Department of PsychologyInstitute of Psychiatry, Psychology & Neuroscience, King's College London, Addison House, Guy's CampusLondonSE1 1UL
8. Department of EpidemiologyJohns Hopkins Bloomberg School of Public Health615 N. Wolfe St., SuiteBaltimore Maryland
9. PANAACEA (Programa Argentino para Niños, Adolescentes y Adultos con Condiciones del Espectro Autista)Repetto 1145Buenos Aires1640 Argentina
10. Division of Autism and Related DisordersDepartment of Pediatrics, Emory University School of Medicine, Director, Infant Toddler Clinical Research Operations Marcus Autism, Center, Children's Healthcare of Atlanta1920 Briarcliff RoadAtlanta Georgia
11. Department of PsychologyUniversity of WashingtonCHDD Box 357920Seattle Washington
12. Department of Psychological & Brain SciencesBoston University100 Cummington MallBoston Massachusetts
13. Pediatrics and Developmental NeuroscienceIntramural Research Program, National Institute of Mental Health 10 Center Dr. Rm 1C250Bethesda Maryland
14. Department of PsychologyStellenbosch UniversityWilcocks BuildingRyneveld StreetStellenbosch South Africa
15. Autism Speaks1 East 33rd Street, 4th Floor New York