Algorithms|Cell Line, Tumor|Cluster Analysis|Colonic Neoplasms|Databases, Genetic|Gene Expression Profiling|Gene Expression Regulation, Neoplastic|Humans|Leukemia|Models, Genetic|Models, Statistical|Neoplasms|Oligonucleotide Array Sequence Analysis|Pattern Recognition, Automated|Principal Component Analysis|Reproducibility of Results|Sensitivity and Specificity