The MSA Atrophy Index (MSA‐AI): An Imaging Marker for Diagnosis and Clinical Progression in Multiple System Atrophy. - Trujillo, Paula; Hett, Kilian; Cooper, Amy; Brown, Amy E.; Iregui, Jessica; Donahue, Manus J.; Landman, M. Erik; Biaggioni, Italo; Bradbury, Margaret; Wong, Cynthia; Stamler, David; Claassen, Daniel O. (Annals of Clinical & Translational Neurology, 2025)