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.
de Jong MA, Wahlberg N, van Eijk M, Brakefield PM, Zwaan BJ.de Jong MA, et al. Among authors: brakefield pm.PLoS One. 2011;6(6):e21385. doi: 10.1371/journal.pone.0021385. Epub 2011 Jun 22.PLoS One. 2011.PMID: 21731725Free PMC article.