1 From the USC MS Center (W.G.), Department of Neurology, Keck School of Medicine of the University of Southern California, Los Angeles; and the Division of Clinical Neurosciences (L.A.), Turku University Hospital, Finland. wgilmore@usc.edu.
2 From the USC MS Center (W.G.), Department of Neurology, Keck School of Medicine of the University of Southern California, Los Angeles; and the Division of Clinical Neurosciences (L.A.), Turku University Hospital, Finland.