Anderson W S, Winberry J, Liu C C, Shi C, Lenz F A
Dept of Neurosurgery, Brigham and Women's Hospital, Boston, Massachusetts, USA.
Dept of Neurosurgery, Johns Hopkins Hospital, Baltimore Maryland, USA 21287-7713.
Contemp Neurosurg. 2010 Feb 15;32(3):1-7. doi: 10.1097/01.CNE.0000369792.40458.fa.