"A major transformation is occurring within the health-care community. Instead of applying general treatments to diverse patient populations, therapies are being customized to patient sub-populations based on their gene expression profiles. This new form of medical practice is known as personalized medicine. Gene expression profile classification is subfield of bioinformatics that is aiding in the transformation to personalized medicine. Gene expression profiling is an important tool for personalized medicine because it allows biomedical researchers to discover biomarkers."