1. Department of Applied Clinical Sciences and Biotechnology, Section of Clinical Epidemiology and Environmental Medicine, University of L’Aquila, Via Vetoio, Località Coppito, 67100 L’Aquila, Italy
2. Abruzzo Region Health System, Reference Regional Centre for Autism, L’Aquila, Italy
3. Department of Pediatrics, San Salvatore Hospital, University of L’Aquila, Località Coppito, L’Aquila 67100, Italy