title: Reply.
authors.affiliation: Department of Neurosurgery Arkansas Neuroscience Institute Little Rock, Arkansas.
authors.forename: S K
authors.initials: SK
authors.lastname: Rammos
authors.affiliation: Department of Neurosurgery Istituto Di Ricovero e Cura a Carattere Scientifico Institute of Neurological Science of Bologna Bologna, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Bortolotti
authors.affiliation: Departments of Radiology and Neurosurgery Mayo Clinic Rochester, Minnesota.
authors.forename: G
authors.initials: G
authors.lastname: Lanzino