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.
Ma CM, Coffey CW, DeWerd LA, Liu C, Nath R, Seltzer SM, Seuntjens JP; American Association of Physicists in Medicine.Ma CM, et al. Among authors: dewerd la.Med Phys. 2001 Jun;28(6):868-93. doi: 10.1118/1.1374247.Med Phys. 2001.PMID: 11439485
Pérez-Calatayud J, Ballester F, Limami Y, DeWerd LA, Nelson K.Pérez-Calatayud J, et al. Among authors: dewerd la.Phys Med Biol. 2001 Aug;46(8):2201-7. doi: 10.1088/0031-9155/46/8/311.Phys Med Biol. 2001.PMID: 11512619