1. The Centre for Applied Genomics, Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto M5G 1L7, Canada
2. Department of Molecular Genetics, University of Toronto, Toronto M5G 1L7, Canada
3. Offord Centre for Child Studies, Department of Psychiatry and Behavioural Neurosciences McMaster University, Hamilton L8P 3B6, Canada
4. Autism Research Unit, The Hospital for Sick Children, Toronto M5G 1X8, Canada
5. Disciplines of Genetics and Medicine, Memorial University of Newfoundland, St. John’s, Newfoundland A1B 3V6, Canada
6. McLaughlin Centre, University of Toronto, Toronto M5G 1L7, Canada
7. Population Diagnostics, Inc., Melville, New York 11747