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.
Karasiewicz J, Sacharczuk M, Was B, Guszkiewicz A, Korwin-Kossakowski M, Gorniewska M, Szablisty E, Modlinski JA.Karasiewicz J, et al.Int J Dev Biol. 2008;52(2-3):315-22. doi: 10.1387/ijdb.072317jk.Int J Dev Biol. 2008.PMID: 18311723Free article.