Figure 3
From: MAID : An effect size based model for microarray data integration across laboratories and platforms
Unsupervised hierarchical clustering analysis. An unsupervised hierarchical clustering of individual samples was performed using relative gene expression (i.e ratios of gene expressions in HCV and normal tissue). Samples cluster according to each individual platform, indicating the presence of intra-study variability due to lab/platform effects (UT designates cDNA arrays/samples from University of Toronto, W-cDNA designates cDNA arrays/samples from University of Washington, and W-oligo designates oligo arrays/samples from University of Washington).