Gene expression profiles retrieved from the GEO Database. Dataset A (60 profiles) is made up of the NCI60 cell lines . Dataset B (13 profiles) is a subset of transcriptional profiles of a diverse array of tissues, organs, and cell lines from a normal human physiological state . Dataset C (4 profiles) encompasses the normal human adult samples derived from colonoscopic biopsy present in a database comprising samples of patients with Crohn's disease or ulcerative colitis . Dataset D (4 profiles) contains normal control samples present in a database containing transcriptional profiles of peripheral blood mononuclear cells (PBMC) obtained by juvenile arthritis patients and healthy controls .