[1] CNRS, IBL, F-59021 Lille, France
[2] HP Pitie Salpetriere, Neuropathol Lab, F-75651 Paris 13, France
[3] Fac Chirurg Dent, Dept Ontol Conservatrice Endodontie, F-44042 Nantes 1, France
[4] CEA, Lab Neurovirol & Neuropathol Expt, F-92265 Fontenay Aux Roses, France
[5] NINDS, Cent Nervous Syst Studies Lab, NIH, Bethesda, MD 20892 USA