[1] Univ Paris 07, Lariboisiere Hosp, Dept Pathol, Paris, France
[2] Univ Bordeaux 2, Neuropathol Lab, F-33076 Bordeaux, France
[3] Univ Paris 05, Salpetriere Hosp, Dept Neurol, Paris, France
[4] Univ Paris 07, Lariboisiere Hosp, Dept Neurol, Paris, France