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.
Lockwood CM, Boulton-Jones JM, Lowenthal RM, Simpson IJ, Peters DK.Lockwood CM, et al. Among authors: simpson ij.Br Med J. 1975 May 3;2(5965):252-4. doi: 10.1136/bmj.2.5965.252.Br Med J. 1975.PMID: 1131574Free PMC article.
Grey AB, Thomas MG, Simpson IJ.Grey AB, et al. Among authors: simpson ij.Aust N Z J Med. 1991 Aug;21(4):442-3. doi: 10.1111/j.1445-5994.1991.tb01349.x.Aust N Z J Med. 1991.PMID: 1953534
Wang CW, Simpson IJ.Wang CW, et al. Among authors: simpson ij.Aust N Z J Med. 1989 Feb;19(1):58-60. doi: 10.1111/j.1445-5994.1989.tb01679.x.Aust N Z J Med. 1989.PMID: 2764807