In the article “Genetics evaluation for the etiologic diagnosis of autism spectrum disorders” which appeared in the January 2008 issue, the last sentence on page 4 appeared with the percentages transposed. The sentence should have been as follows: “The generally reported recurrence risk is 7% if the first affected child is female and 4% if first child is male.”

Schaefer GB, Mendelsohn NJ. Genetics evaluation for the etiologic diagnosis of autism spectrum disorders. Genet Med 2008;10:4–12.

In the article “Clinical genetics evaluation in identifying the etiology of autism spectrum disorders” which appeared in the April 2008 issue, a sentence on page 304 under list item 5 appeared with the percentages transposed. The sentence should have been as follows: “The best available published empiric recurrence risks for full siblings are 7% if the affected child is a girl and 4% if the affected child is a boy.”

Schaefer GB, Mendelsohn NJ, and the Professional Practice and Guidelines Committee. Clinical genetic evaluation in identifying the etiology of autism spectrum disorders. Genet Med 2008;10:301–305.