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.
Curry A, Bryden A, Morgan-Capner P, Fox A, Guiver M, Martin L, Mutton K, Wright P, Mannion P, Westwell A, Cheesbrough J, Ashton I, Blackley A.Curry A, et al.J Clin Pathol. 1999 Jun;52(6):471-4. doi: 10.1136/jcp.52.6.471.J Clin Pathol. 1999.PMID: 10562819Free PMC article.