Spetzler R F, Riina H A, Lemole G M
Division of Neurological Surgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, 350 W. Thomas Road, Phoenix, AZ 85013-4496, USA.
Neurosurgery. 2001 Oct;49(4):902-8. doi: 10.1097/00006123-200110000-00022.