Breast Neoplasms|Cell Line, Tumor|Cluster Analysis|Computational Biology|DNA Probes|DNA, Complementary|Data Interpretation, Statistical|Gene Expression|Gene Expression Profiling|Gene Expression Regulation|Gene Expression Regulation, Neoplastic|Humans|Lung Neoplasms|Neoplasms|Oligonucleotide Array Sequence Analysis|Phylogeny|RNA|RNA, Neoplasm|Reproducibility of Results|Sensitivity and Specificity