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.
el-Bassel N, Schilling RF, Irwin KL, Faruque S, Gilbert L, Von Bargen J, Serrano Y, Edlin BR.el-Bassel N, et al. Among authors: irwin kl.Am J Public Health. 1997 Jan;87(1):66-70. doi: 10.2105/ajph.87.1.66.Am J Public Health. 1997.PMID: 9065229Free PMC article.
Lafferty WE, Downey L, Holan CM, Lind A, Kassler W, Tao G, Irwin KL.Lafferty WE, et al. Among authors: irwin kl.Am J Public Health. 2002 Nov;92(11):1779-83. doi: 10.2105/ajph.92.11.1779.Am J Public Health. 2002.PMID: 12406808Free PMC article.