Columbia subject headings:
Breast--Cancer--Endocrine aspects--Congresses.
Estrogen--Receptors--Congresses.
Progesterone--Receptors--Congresses.
Uterus--Cancer--Endocrine aspects--Congresses.
Harvard subject headings:
Breast--Cancer--Endocrine aspects--Congresses
Estrogen--Receptors--Congresses.
Progesterone--Receptors--Congresses.
Uterus--Cancer--Endocrine aspects--Congresses.
Princeton subject headings: