title: Response from kelley, buckner and petersen.
authors.affiliation: Department of Neurology & Neurological Surgery, and the Department of Radiology, Washington University School of Medicine, St Louis, MO 63110, USA.
authors.forename: W M
authors.initials: WM
authors.lastname: Kelley
authors.forename: R L
authors.initials: RL
authors.lastname: Buckner
authors.forename: S E
authors.initials: SE
authors.lastname: Petersen