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.
Zimmermann M, Seifert V.Zimmermann M, et al.Neurosurgery. 1998 Oct;43(4):863-75; discussion 875-6. doi: 10.1097/00006123-199810000-00083.Neurosurgery. 1998.PMID: 9766314Review.
Raabe A, Grolms C, Sorge O, Zimmermann M, Seifert V.Raabe A, et al. Among authors: zimmermann m.Neurosurgery. 1999 Sep;45(3):477-83. doi: 10.1097/00006123-199909000-00012.Neurosurgery. 1999.PMID: 10493369
Zimmermann M, Jung C, Raabe A, Spanehl O, Fach K, Seifert V.Zimmermann M, et al.Neurosurgery. 2001 Apr;48(4):902-8; discussion 908-10. doi: 10.1097/00006123-200104000-00043.Neurosurgery. 2001.PMID: 11322451