1. From the Department of Neurosurgery, Neurosurgery Research Group, Biomedicum Helsinki, Helsinki University Central Hospital, Helsinki, Finland (S.M., J.F., J.M., P.H., J.H., M.N.); Wihuri Research Institute, Translational Cancer Biology Program, Biomedicum Helsinki (A.A.) and Department of Neurology, Institute of Biomedicine, Experimental MRI Laboratory (U.A.-R.), University of Helsinki, Helsinki, Finland; and Institute of Pathology Laenggasse, Bern, Switzerland (M.v.G.).