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.
Wolf A, Levi L, Mirvis S, Ragheb J, Huhn S, Rigamonti D, Robinson WL.Wolf A, et al.J Neurosurg. 1991 Dec;75(6):883-90. doi: 10.3171/jns.1991.75.6.0883.J Neurosurg. 1991.PMID: 1941117
Cheng CL, Wolf AL, Mirvis S, Robinson WL.Cheng CL, et al. Among authors: wolf al.Spine (Phila Pa 1976). 1992 Mar;17(3):257-60. doi: 10.1097/00007632-199203000-00002.Spine (Phila Pa 1976). 1992.PMID: 1566160