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.(1997-09-02時点)
