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.
Warner TD, Mitchell JA, D'Orleans-Juste P, Ishii K, Förstermann U, Murad F.Warner TD, et al. Among authors: mitchell ja.Mol Pharmacol. 1992 Feb;41(2):399-403.Mol Pharmacol. 1992.PMID: 1311412