Source:http://linkedlifedata.com/resource/umls/id/C2983642
NCI: A type of randomized clinical trial in which study subjects are arranged into groups with unequal numbers by prespecified criteria, such as race or sex, to reduce variability of results within a treatment group.,NCI: A type of randomized study or trial in which study subjects are arranged into groups with unequal numbers by prespecified criteria, such as race or sex, to reduce variability of results within a treatment group.