Figure 2From: A whole blood gene expression-based signature for smoking status Hierarchical clustering of 209 subjects and 227 array genes associated with smoking (p < 0.001). The dendogram on top shows correlations between subjects; black bars at bottom denote current smokers; red bars denote recently quit smokers. Dendogram on the left shows correlations between genes; positions of representative cell-specific genes are shown on the right.Back to article page