PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2993339-1 1985 Previous studies suggested that estrogen administration leads to an increase in circulating immunoreactive PTH (iPTH), thought to be secondary to a slight decrease in serum calcium resulting from inhibition of bone resorption. ipth 112-116 parathyroid hormone Homo sapiens 107-110