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.
Boogaarts H, van Nuenen-Platvoet W, van den Abbeele L, Petersen H, Draskovic I, de Vries J, Westert G, Grotenhuis JA, Bartels R.Boogaarts H, et al.JMIR Res Protoc. 2014 Nov 13;3(4):e60. doi: 10.2196/resprot.3736.JMIR Res Protoc. 2014.PMID: 25405364Free PMC article.