Classification and regression tree with leave-one-out cross-validation for cancer-free lung tissue, adenocarcinoma (AdCa), squamous cell carcinoma (SqCC), and small cell cancer of the lung (SCLC).

<p>using immunohistochemical scores of 22 candidate proteins in 146 tissue samples from uranium miners. Staining of mucin 1 (MUC1) in the membrane, hypoxia-inducible factor 1 α (HIF1A) in the cytoplasm, and NK2 homeobox 1 (NKX2-1) in the nucleus resulted in a three-protein classifier with a failure rate of 11.0%.</p>