1. From the Center for Molecular Medicine and Genetics (S.W., M. van der V., H.K., G.T.) and Department of Surgery (H.K.), Wayne State University School of Medicine, Detroit, Mich; Department of Neurosurgery, University of Kuopio, Kuopio, Finland (A.R., K.H.); and Department of Neurosurgery, University of Helsinki, Helsinki, Finland (E.L., J.F., M.N., J.J., J.H.).