Comment on

• A prospective study of the emergence of early behavioral signs of autism.

  Ozonoff S, Iosif AM, Baguio F, Cook IC, Hill MM, Hutman T, Rogers SJ, Rozga A, Sangha S, Sigman M, Steinfeld MB, Young GS. Ozonoff S, et al. J Am Acad Child Adolesc Psychiatry. 2010 Mar;49(3):256-66.e1-2. J Am Acad Child Adolesc Psychiatry. 2010. PMID: 20410715 Free PMC article.
• Genetic variance for autism screening items in an unselected sample of toddler-age twins.

  Stilp RL, Gernsbacher MA, Schweigert EK, Arneson CL, Goldsmith HH. Stilp RL, et al. J Am Acad Child Adolesc Psychiatry. 2010 Mar;49(3):267-76. doi: 10.1016/j.jaac.2009.11.012. J Am Acad Child Adolesc Psychiatry. 2010. PMID: 20410716 Free PMC article.