[1] UNIV TURKU, DEPT PATHOL, NEUROPATHOL LAB, SF-20520 TURKU 52, FINLAND
[2] UNIV LUND HOSP, DEPT NEUROL, S-22185 LUND, SWEDEN
[3] GOTHENBURG UNIV, DEPT PATHOL 1, NEUROPATHOL LAB, S-41345 GOTHENBURG, SWEDEN
[4] UNIV UPPSALA, DEPT PATHOL, NEUROPATHOL LAB, S-75185 UPPSALA, SWEDEN