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.
Virkamäki A, Puhakainen I, Koivisto VA, Vuorinen-Markkola H, Yki-Järvinen H.Virkamäki A, et al.J Clin Endocrinol Metab. 1992 Mar;74(3):673-9. doi: 10.1210/jcem.74.3.1740504.J Clin Endocrinol Metab. 1992.PMID: 1740504