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.
Engel LW, Straus SE.Engel LW, et al. Among authors: straus se.Nat Rev Drug Discov. 2002 Mar;1(3):229-37. doi: 10.1038/nrd750.Nat Rev Drug Discov. 2002.PMID: 12120507Review.