Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

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.

Https

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.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1998 Oct;52(10):605.
doi: 10.1136/jech.52.10.605.

Epidemiology: bridges over (and across) roaring levels

Epidemiology: bridges over (and across) roaring levels

M Porta et al. J Epidemiol Community Health. 1998 Oct.
No abstract available

PubMed Disclaimer

References

    1. Perspect Biol Med. 1998 Winter;41(2):259-66 - PubMed
    1. Am J Public Health. 1998 Feb;88(2):216-22 - PubMed

LinkOut - more resources