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.
Nyberg DA, Luthy DA, Cheng EY, Sheley RC, Resta RG, Williams MA.Nyberg DA, et al. Among authors: williams ma.Am J Obstet Gynecol. 1995 Oct;173(4):1030-5. doi: 10.1016/0002-9378(95)91322-x.Am J Obstet Gynecol. 1995.PMID: 7485289Clinical Trial.
Cheng EY, Luthy DA, Zebelman AM, Williams MA, Lieppman RE, Hickok DE.Cheng EY, et al. Among authors: williams ma.Obstet Gynecol. 1993 Jan;81(1):72-7.Obstet Gynecol. 1993.PMID: 7677967
Velentgas P, Benga-De E, Williams MA.Velentgas P, et al. Among authors: williams ma.Epidemiology. 1994 May;5(3):345-8. doi: 10.1097/00001648-199405000-00015.Epidemiology. 1994.PMID: 8038251
Sohaey R, Nyberg DA, Sickler GK, Williams MA.Sohaey R, et al. Among authors: williams ma.Radiology. 1994 Feb;190(2):393-6. doi: 10.1148/radiology.190.2.8284386.Radiology. 1994.PMID: 8284386