PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 32500111-11 2020 We measured and confirmed ultra-low E2 and E1 concentrations in sera from patients on the aromatase inhibitors letrozole or exemestane. exemestane 124-134 cystatin 12, pseudogene Homo sapiens 36-45