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.
O'Brien E, Fitzgerald D, O'Malley K.O'Brien E, et al.Br Med J (Clin Res Ed). 1985 Mar 9;290(6470):729-34. doi: 10.1136/bmj.290.6470.729.Br Med J (Clin Res Ed). 1985.PMID: 3918732Free PMC article.Review.No abstract available.
Fitzgerald DJ, O'Callaghan WG, O'Brien E, Johnson H, Mulcahy R, Hickey N.Fitzgerald DJ, et al.Ir Med J. 1985 Aug;78(8):216-8.Ir Med J. 1985.PMID: 4044205Clinical Trial.No abstract available.