Participation in the PGP may help advance the field of personalized medicine, which in the future could benefit people who suffer from cancer, heart disease, diabetes, and other common diseases. With personalized medicine, information about a patient's genotype or gene expression profile can be used to tailor medical care to the person's needs. Doctors will be able to provide specific therapy or preventative measures that are particularly suited to an individual. Genetic information may also be used to select the right medication and dosage.