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.
Birchall NM, Gunn TR, Mora JD, Mok PM.Birchall NM, et al. Among authors: mok pm.N Z Med J. 1982 Nov 24;95(720):818-9.N Z Med J. 1982.PMID: 6760005No abstract available.