title: A 67-year-old man with headaches, gait changes, and altered mental status.
authors.affiliation: Department of Neurology, University of California, San Francisco, CA, USA.
authors.forename: Yana L
authors.initials: YL
authors.lastname: Kriseman
authors.forename: Han
authors.initials: H
authors.lastname: Lee
authors.forename: Sharon
authors.initials: S
authors.lastname: Chung
authors.forename: S Andrew
authors.initials: SA
authors.lastname: Josephson