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.
Gurol-Urganci I, de Jongh T, Vodopivec-Jamsek V, Car J, Atun R.Gurol-Urganci I, et al.Cochrane Database Syst Rev. 2012 Jun 13;2012(6):CD007456. doi: 10.1002/14651858.CD007456.pub2.Cochrane Database Syst Rev. 2012.PMID: 22696369Free PMC article.Review.
Gurol-Urganci I, de Jongh T, Vodopivec-Jamsek V, Atun R, Car J.Gurol-Urganci I, et al.Cochrane Database Syst Rev. 2013 Dec 5;2013(12):CD007458. doi: 10.1002/14651858.CD007458.pub3.Cochrane Database Syst Rev. 2013.PMID: 24310741Free PMC article.Review.