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Patient breath samples with overlayed heatmaps which identify the 5 most important peaks from each CV model (up to 20 peaks total) in the classification of liver cirrhosis for a healthy control (A), and 3 individuals with stage I (B), stage II (C), and stage III (D) cirrhosis, respectively. Compounds are represented by indices on the y-axis and VOC signal value is on the x-axis; darker shading indicates the feature was selected by multiple CV models.
