1. From the Neurosurgery Research Group (E.L., R.T., J.H., M.N., A.L.), Biomedicum Helsinki, Helsinki University Central Hospital, Helsinki, Finland; the Protein Chemistry/Proteomics Laboratory (M.B.), Institute of Biomedicine, University of Helsinki, Helsinki, Finland; and the Department of Neurosurgery (R.D., J.H., S.J., M.N., A.L.), Helsinki University Central Hospital, Helsinki, Finland.