Author Correction: Assessment of haptoglobin alleles in autism spectrum disorders.

We thank John Hatton of the Institute of Biomedical Technologies (CNR-ITB) for proofreading the manuscript. The Cell line and DNA bank of Rett Syndrome, X-linked mental retardation and other genetic diseases, member of the Telethon Network of Genetic Biobanks (project no. The Cell line and DNA bank of Rett Syndrome, X-linked mental retardation and other genetic diseases, member of the Telethon Network of Genetic Biobanks (project no. [Extracted from the article]