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.
Gunawardhana SA, Somaratne SC, Fernando MA, Gunaratne PS.Gunawardhana SA, et al. Among authors: gunaratne ps.Ceylon Med J. 2013 Mar;58(1):21-5. doi: 10.4038/cmj.v58i1.5359.Ceylon Med J. 2013.PMID: 23549719Free article.