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.
Piek JP, Rigoli D, Pearsall-Jones JG, Martin NC, Hay DA, Bennett KS, Levy F.Piek JP, et al.Twin Res Hum Genet. 2007 Aug;10(4):587-96. doi: 10.1375/twin.10.4.587.Twin Res Hum Genet. 2007.PMID: 17708700
Pearsall-Jones JG, Piek JP, Rigoli D, Martin NC, Levy F.Pearsall-Jones JG, et al. Among authors: piek jp.Twin Res Hum Genet. 2009 Aug;12(4):381-91. doi: 10.1375/twin.12.4.381.Twin Res Hum Genet. 2009.PMID: 19653839
Pearsall-Jones JG, Piek JP, Rigoli D, Martin NC, Levy F.Pearsall-Jones JG, et al. Among authors: piek jp.Res Dev Disabil. 2011 Jul-Aug;32(4):1245-52. doi: 10.1016/j.ridd.2011.01.042. Epub 2011 Feb 23.Res Dev Disabil. 2011.PMID: 21349687