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.
Robinson KA, Saldanha IJ, McKoy NA.Robinson KA, et al.Int J Technol Assess Health Care. 2011 Jul;27(3):247-52. doi: 10.1017/S0266462311000225.Int J Technol Assess Health Care. 2011.PMID: 21756412