Number of categories of genes identified by ALIGATOR for OZALC-NAG and SAGE studies for smoking quantity.

#SNPs: number of SNPs that achieved a significant for each threshold for OZALC-NAG and SAGE studies;#Genes: number of genes mapped;#cat and p-value reflect the excess of categories of genes (GO terms or KEGG pathways) for the thresholds applied to the category-specific p-values in the OZALC-NAG and the SAGE studies. “Common” rows show the number of overlapping categories of genes significantly enriched for both studies and the corresponding statistical significance.