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.
Partridge M, Evans PM, Symonds-Tayler JR.Partridge M, et al. Among authors: evans pm.Phys Med Biol. 1999 Oct;44(10):2381-96. doi: 10.1088/0031-9155/44/10/302.Phys Med Biol. 1999.PMID: 10533917