1. From the Departments of Neurology (C.Q., K.M.), and Radiology (M.F.), University of Pennsylvania, Perelman School of Medicine, Philadelphia; ImaginAb (W.L., I.W.), Inc., Inglewood, CA; Department of Medicine (N.G.), Duke University School of Medicine, Durham, NC; Abcuro, Inc., Newton, MA; Department of Radiology (J.M.), University of Alabama at Birmingham, Heersink School of Medicine; and Department of Neurology (S.A.G.), Brigham and Women's Hospital and Boston Childrens Hospital, Harvard Medical...