Figure 1
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2105-11-483/MediaObjects/12859_2010_Article_3940_Fig1_HTML.jpg)
Overview of Microarray Datasets Used and Dataset Inclusion Criteria: a) Distribution of all Affymetrix microarray data used based on the number of cancer versus normal samples in each dataset. Datasets used for IV1/SAM1 test are shown inside the ellipse. Additional datasets included in SAM2 only are located on the axes. b) Selection method used for the inclusion of Affymetrix datasets used for the analyses in this study.