An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Ferguson ER, Katzenellenbogen BS.Ferguson ER, et al. Among authors: katzenellenbogen bs.Endocrinology. 1977 May;100(5):1242-51. doi: 10.1210/endo-100-5-1242.Endocrinology. 1977.PMID: 849721