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.
Stoker A, Jeffery R.Stoker A, et al. Among authors: jeffery r.Soc Sci Med. 1988;27(5):563-7. doi: 10.1016/0277-9536(88)90380-2.Soc Sci Med. 1988.PMID: 3227363
Jeffery P, Das A, Dasgupta J, Jeffery R.Jeffery P, et al. Among authors: jeffery r.Reprod Health Matters. 2007 Nov;15(30):172-8. doi: 10.1016/S0968-8080(07)30320-0.Reprod Health Matters. 2007.PMID: 17938082