1. •• American Psychiatric Association DSM-5 Task Force. Diagnostic and statistical manual of mental disorders: DSM-5. 5th ed. Washington, D.C.: American Psychiatric Association; 2013. This publication specified the most current diagnostic criteria for ASD which grouped all the subcategories of autism into a single disorder. Physicians should refer to this while evaluating patients with ASD.
2. Autism and Developmental Disabilities Monitoring Network Surveillance Year 2008 Principal Investigators; Centers for Disease Control and Prevention. Prevalence of autism spectrum disorders—Autism and Developmental Disabilities Monitoring Network, 14 sites, United States, 2008. Morbidity and mortality weekly report Surveillance summaries. 2012;61(3):1–19.
3. Rosenberg RE, Law JK, Yenokyan G, McGready J, Kaufmann WE, Law PA. Characteristics and concordance of autism spectrum disorders among 277 twin pairs. Arch Pediatr Adolesc Med. 2009;163(10):907–14. doi: 10.1001/archpediatrics.2009.98 .
4. Nordenbaek C, Jorgensen M, Kyvik KO, Bilenberg N. A Danish population-based twin study on autism spectrum disorders. Eur Child Adolesc Psychiatry. 2013;. doi: 10.1007/s00787-013-0419-5 .
5. Kerekes N, Brandstrom S, Lundstrom S, Rastam M, Nilsson T, Anckarsater H. ADHD, autism spectrum disorder, temperament, and character: phenotypical associations and etiology in a Swedish childhood twin study. Compr Psychiatry. 2013;. doi: 10.1016/j.comppsych.2013.05.009 .