[1
]From the Department of Epidemiology and Biostatistics (M.L.B., A.W.H., A.H., D.E.G.)
and Department of General Practice (A.W.H.), Erasmus University Medical School, Rotterdam,
Netherlands; Julius Center of Patient Oriented Research (M.L.B., A.W.H., D.E.G.),
Utrecht University, Netherlands; and Department of Neurology (P.J.K.), University
Hospital Rotterdam, The Netherlands.