Assertion: breast cancer's estrogen | /r/HasProperty | er
Facets:
Source sentences:
text: Hormone receptor-positive (or hormone-positive) breast cancer cells have either estrogen (ER) or progesterone (PR) receptors or both.
text: Hormone receptors are identified as estrogen (ER) and progesterone (PR).
text: Most of these types of cancers are hormone receptor positive, usually estrogen (ER) positive, which means they grow in response to the hormone.