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.
Chen L, Abbey CK, Boone JM.Chen L, et al. Among authors: boone jm.Phys Med Biol. 2013 Mar 21;58(6):1663-81. doi: 10.1088/0031-9155/58/6/1663. Epub 2013 Feb 19.Phys Med Biol. 2013.PMID: 23422272Free PMC article.