1. From the Albert Einstein College of Medicine (R.B.L., D.C.B.), Bronx, NY; Vedanta Research (K.M.F., M.L.R.), Chapel Hill, NC; University of Cincinnati Headache and Facial Pain Center (V.T.M.), University of Cincinnati College of Medicine, OH; CHC Group, LLC (L.B.H.), North Wales, PA; Allergan plc (A.M.A.), Irvine, CA; NIHR-Wellcome Trust King's Clinical Research Facility (P.J.G.), King's College, London, UK; and Department of Neurology (P.J.G.), University of California, San Francisco.