1. From the Departments of Epidemiology & Biostatistics (M.A.I., M.v.O., F.J.d.J., A.H., J.C.M.W., M.M.B.B.), Neurology (M.A.I., M.v.O., F.J.d.J., P.J.K.), and Medical Informatics (J.A.K.), Erasmus MC University Medical Center, Erasmus, The Netherlands.