Fig. 2From: The genetics of smoking in individuals with chronic obstructive pulmonary diseaseManhattan plots of smoking GWASs in Lung Health Study. The plots show the P values (−log10 scale) on the Y axes and the SNP positions across 22 autosomal chromosomes on the X axes. The horizontal red line represents the genome-wide cut-off of 5 × 10− 08Back to article page