The hormone receptors of the primary tumor were known in 15 ( ER ) and 14 ( PR ) patients , respectively .
the hormone receptors of the primary tumor were known in 15 ( er ) and 14 ( pr ) patients , respectively .
O B-protein_family_or_group I-protein_family_or_group O O B-tissue I-tissue O O O O O B-protein_family_or_group O O O O B-protein_family_or_group O B-multi_cell O O O