1. From the Genetic Epidemiology Unit, Department of Epidemiology (A.I., S.M.W., B.A.O., C.M.v.D.), Department of Radiology (D.B., M.A.I.), Department of Epidemiology (D.B., A.D., A.H., M.A.I., A.G.U., O.H.F., J.C.W.), and Department of Internal Medicine (A.G.U.), Erasmus Medical Center, Rotterdam, The Netherlands; and Centre for Medical Systems Biology, Leiden, The Netherlands (A.I., C.M.v.D.).