1. Department of Epidemiology and Biostatistics Drexel University School of Public Health Philadelphia Pennsylvania USA
2. Department of Neuroscience Karolinska Institutet Stockholm Sweden
3. Department of Public Health Sciences Karolinska Institutet Stockholm Sweden
4. Centre for Epidemiology and Community Medicine Stockholm County Council Stockholm Sweden
5. Population Health Sciences Bristol Medical School Bristol UK
6. Avon and Wiltshire Mental Health Partnership NHS Trust Bristol UK
7. Department of Psychiatry Icahn School of Medicine at Mount Sinai New York New York USA
8. Seaver Autism Center for Research and Treatment at Mount Sinai New York New York USA
9. Department of Medical Epidemiology and Biostatistics Karolinska Institutet Stockholm Sweden
10. A. J. Drexel Autism Institute Philadelphia Pennsylvania USA