Maroon Joseph C, Gardner Paul, Abla Adnan A, El-Kadi Hikmat, Bost Jeffrey
Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA 15213, USA.
Surg Neurol. 2007 Feb;67(2):163-8; discussion 168. doi: 10.1016/j.surneu.2006.03.045. Epub 2006 Oct 6.