Results from these studies (Mulligan et al., 2006; Kimpel et al., 2007; Liu et al., 2006) were obtained from either the publishers’ web sites or the authors. Flatscher-Bader et al. (2008) published only a small subset of the genes available on their microarray platform, therefore, the complete dataset was downloaded from Gene Expression Omnibus (GEO) database (http://www.ncbi.nlm.nih.gov/geo/; GSE9058) and gene expression values in alcoholics and controls were compared using a two-tail t-test.
