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.
Ross MW, Berg RC, Schmidt AJ, Hospers HJ, Breveglieri M, Furegato M, Weatherburn P; European MSM Internet Survey (EMIS) Network.Ross MW, et al. Among authors: berg rc.BMJ Open. 2013 Feb 4;3(2):e001928. doi: 10.1136/bmjopen-2012-001928. Print 2013.BMJ Open. 2013.PMID: 23386580Free PMC article.
Toews I, Glenton C, Lewin S, Berg RC, Noyes J, Booth A, Marusic A, Malicki M, Munthe-Kaas HM, Meerpohl JJ.Toews I, et al. Among authors: berg rc.PLoS One. 2016 Aug 3;11(8):e0159290. doi: 10.1371/journal.pone.0159290. eCollection 2016.PLoS One. 2016.PMID: 27487090Free PMC article.