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.
Morgan S, Smith H, Simpson I, Liddiard GS, Raphael H, Pickering RM, Mant D.Morgan S, et al. Among authors: simpson i.BMJ. 1999 Feb 6;318(7180):368-72. doi: 10.1136/bmj.318.7180.368.BMJ. 1999.PMID: 9933201Free PMC article.
Reilley B, Simpson I, Ford N, DuBois M.Reilley B, et al. Among authors: simpson i.BMJ. 2002 Feb 9;324(7333):361. doi: 10.1136/bmj.324.7333.361a.BMJ. 2002.PMID: 11834572Free PMC article.No abstract available.
de Jong K, Mulhern M, Ford N, Simpson I, Swan A, van der Kam S.de Jong K, et al. Among authors: simpson i.Lancet. 2002 Apr 27;359(9316):1517-8. doi: 10.1016/S0140-6736(02)08420-9.Lancet. 2002.PMID: 11988266No abstract available.
Bullock RE, Amer HA, Simpson I, Ward MK, Hall RJ.Bullock RE, et al. Among authors: simpson i.Br Med J (Clin Res Ed). 1984 Dec 1;289(6457):1479-84. doi: 10.1136/bmj.289.6457.1479.Br Med J (Clin Res Ed). 1984.PMID: 6439281Free PMC article.
Simpson IR, McKinnon KA, Kennedy D, Lawrence DM, Lehner F, Seager R.Simpson IR, et al.Proc Natl Acad Sci U S A. 2024 Jan 2;121(1):e2302480120. doi: 10.1073/pnas.2302480120. Epub 2023 Dec 26.Proc Natl Acad Sci U S A. 2024.PMID: 38147646