“…Currently, few studies on candidate genes which converge on linkage signals have been consistently associated with autism (Folstein and Rosen-Sheidley, 2001;Bartlett et al, 2005). Among them, and within a widely confirmed linkage region in the long arm of chromosome 7, recent evidence has shown that Wnt2 and Engrailed 2 (EN2), a Wnt/b-catenin target gene (McGrew et al, 1999), may be genetically associated with autism (Petit et al, 1995;Wassink et al, 2001;McCoy et al, 2002;Zhong et al, 2003;Gharani et al, 2004;Benayed et al, 2005).…”