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.
Petty MT, Deacon MC, Alexeyeff MA, St John DJ, Young GP.Petty MT, et al.Med J Aust. 1992 Mar 16;156(6):420-3. doi: 10.5694/j.1326-5377.1992.tb139848.x.Med J Aust. 1992.PMID: 1545750
Petty M, Twigg D, Young S.Petty M, et al.Collegian. 2002 Jan;9(1):6-7. doi: 10.1016/s1322-7696(08)60037-2.Collegian. 2002.PMID: 11893120No abstract available.