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.
Coppens CM, de Boer SF, Steimer T, Koolhaas JM.Coppens CM, et al.Physiol Behav. 2012 Mar 20;105(5):1156-60. doi: 10.1016/j.physbeh.2011.12.013. Epub 2011 Dec 22.Physiol Behav. 2012.PMID: 22212239Free article.
Coppens CM, de Boer SF, Steimer T, Koolhaas JM.Coppens CM, et al.Behav Genet. 2013 May;43(3):220-6. doi: 10.1007/s10519-013-9588-8. Epub 2013 Feb 16.Behav Genet. 2013.PMID: 23417785Free article.