Prognostic factors in children with supratentorial (nonpineal) primitive neuroectodermal tumors. A neurosurgical perspective from the Childrens Cancer Group. - Albright,A.L.; Wisoff,J.H.; Zeltzer,P.M.; Boyett,J.M.; Rorke,L.B.; Stanley,P.; Geyer,J.R.; Milstein,J.M. (Pediatr Neurosurg, 1995)