1. From the Neurovascular Clinical Science Unit (O.C.S., L.K., L.A.K., N.H., M.M., A. Merwick, J.D., D.H., G.H., E.B.W., P.J.K.), Mater University Hospital/University College Dublin; Connolly Hospital (P.M.E.M.); Beaumont Hospital (A. Moore, J.M.); and the Centre for Support and Training in Analysis and Research (CSTAR), School of Public Health and Population Science (L.D.), University College Dublin, Dublin, Ireland.