Joep Killestein1, Anthony T Reder2. 1. From the Department of Neurology (J.K.), Amsterdam UMC, Vrije Universiteit Amsterdam, MS Center Amsterdam, Amsterdam Neuroscience, the Netherlands; and Department of Neurology (A.T.R.), University of Chicago, IL. j.killestein@vumc.nl. 2. From the Department of Neurology (J.K.), Amsterdam UMC, Vrije Universiteit Amsterdam, MS Center Amsterdam, Amsterdam Neuroscience, the Netherlands; and Department of Neurology (A.T.R.), University of Chicago, IL.