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.
Ramsay ME, Andrews N, Kaczmarski EB, Miller E.Ramsay ME, et al.Lancet. 2001 Jan 20;357(9251):195-6. doi: 10.1016/S0140-6736(00)03594-7.Lancet. 2001.PMID: 11213098
Ramsay ME, Yarwood J, Lewis D, Campbell H, White JM.Ramsay ME, et al.Br J Gen Pract. 2002 Nov;52(484):912-6.Br J Gen Pract. 2002.PMID: 12434960Free PMC article.