DAOA and mood disorder: Convergent lines of biological evidence suggest that DAOA is an attractive candidate gene for major mood disorders.2,3 Multiple studies have been conducted to characterize the association of DAOA with major mood disorders in diverse populations, but inconsistent results have been reported.4 The inconsistent associations of SNPs in DAOA with major mood disorders may be explained by various study assertions, ethnic heterogeneity, and insufficient statistical power.