[1] Univ Roma La Sapienza, Dept Expt Med & Pathol, I-00161 Rome, Italy
[2] Natl Neurol Inst C Besta, Div Neuropathol, Milan, Italy
[3] Neuromed Inst, Isernia, Italy
[4] Catholic Univ Rome, Dept Pediat, Rome, Italy
[5] Catholic Univ Rome, Inst Neurosurg, Rome, Italy
[6] ENEA CR, Biotechnol Unit, Rome, Italy
[7] Cenci Bolognetti Fdn, Inst Pasteur, Rome, Italy