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.
Clark PD, Ryan GA.Clark PD, et al. Among authors: ryan ga.Med J Aust. 1973 Jun 23;1(25):1217-22. doi: 10.5694/j.1326-5377.1973.tb128809.x.Med J Aust. 1973.PMID: 4724855No abstract available.