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.
Borek C, Ong A, Stevens VL, Wang E, Merrill AH Jr.Borek C, et al.Proc Natl Acad Sci U S A. 1991 Mar 1;88(5):1953-7. doi: 10.1073/pnas.88.5.1953.Proc Natl Acad Sci U S A. 1991.PMID: 2000399Free PMC article.
Forrester JE, Wang XD, Knox TA, Borek CG, Tang AM, Johnson EJ.Forrester JE, et al. Among authors: borek cg.J Public Health Policy. 2009 Sep;30(3):285-99. doi: 10.1057/jphp.2009.20.J Public Health Policy. 2009.PMID: 19806070Free PMC article.