Ratio of concentrations of estrogen receptors to progesterone receptors (ER/PR) in the cytosol of breast cancers (stratification by forming of groups differing in PR)

Abstract

We divided the results of radio-receptor analysis of estrogen and progesterone receptors (ER and PR) into the groups with the approximately same concentrations of PR because PR is nearly not changing due to the age (in contrast to the age unstable ER)