In a non-parametric test ( Kruskal-Wallis ) a strong negative association was found between high levels of c-erbB2 amplification and absence of estrogen receptor ( ER ) ( P = . 0009 ) or progesterone receptor ( PR ) ( P = . 011 ) expression .
in a non-parametric test ( kruskal-wallis ) a strong negative association was found between high levels of c-erbb2 amplification and absence of estrogen receptor ( er ) ( p = . 0009 ) or progesterone receptor ( pr ) ( p = . 011 ) expression .
O O B-other_name I-other_name O O O O O O O O O O O O O B-DNA_domain_or_region O O O O O O O O O O O O O O O O B-protein_family_or_group I-protein_family_or_group O B-protein_family_or_group O O O O O O O O O