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.
Whittle BJ, Boughton-Smith NK, Moncada S.Whittle BJ, et al. Among authors: boughton smith nk.Ann N Y Acad Sci. 1992;664:126-39. doi: 10.1111/j.1749-6632.1992.tb39755.x.Ann N Y Acad Sci. 1992.PMID: 1280930Review.No abstract available.