tokens: ER variants , generated by alternative splicing , have been detected in human breast cancer , but also in normal mammary glands , therefore their role in tumorigenesis has been questioned .
folded_tokens: er variants , generated by alternative splicing , have been detected in human breast cancer , but also in normal mammary glands , therefore their role in tumorigenesis has been questioned .
labels: B-protein_family_or_group O O O O O O O O O O O B-other_name B-other_name I-other_name O O O O B-body_part I-body_part I-body_part O O O O O B-other_name O O O O