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.
Lahti-Koski M, Taskinen O, Similä M, Männistö S, Laatikainen T, Knekt P, Valsta LM.Lahti-Koski M, et al.Eur J Public Health. 2008 Dec;18(6):637-43. doi: 10.1093/eurpub/ckn089. Epub 2008 Oct 14.Eur J Public Health. 2008.PMID: 18854358