1. From the Department of Neurology (D.J.N., A.A., G.J.E.R.), Rudolf Magnus Institute of Neuroscience, and Julius Center for Health Sciences and Primary Care (A.A., H.K.), University Medical Center Utrecht, Utrecht, The Netherlands; Department of Medicine at Karolinska University Hospital Solna, and Clinical Epidemiology Unit, Karolinska Institute (P.B., J.A.), Stockholm, Sweden; and Department of Epidemiology (E.B.), University Medical Center Groningen, Groningen, The Netherlands.