1. Center for Autism Research; Children's Hospital of Philadelphia; Philadelphia Pennsylvania
2. Laboratoire de Neurosciences Cognitives; INSERM U960, DEC, Ecole Normale Supérieure; Paris France
3. School of Behavioral and Brain Sciences; The University of Texas at Dallas; Richardson Texas
4. Department of Pediatrics; University of Pennsylvania School of Medicine; Philadelphia PA
5. Departments of Psychiatry; Perelman School of Medicine; University of Pennsylvania; Philadelphia Pennsylvania