To date, no gene has yet been identified which is reliably associated with this serious and prevalent disorder. Furthermore, the gene identification efforts aimed at elucidating the underlying genetic susceptibility to CD have paled in comparison with, e.g., the considerable and extensive effort surrounding the identification of genes involved in another common childhood disorder, ADHD.26 In this study, we report results from a genome-wide association study (GWAS) of retrospectively reported CD symptomatology.
