1. Division of Neurology and Neuropathology, “Carlo Besta” National Neurological Institute, 20133 Milan, Italy.
2. Division of Neuroradiology, “Carlo Besta” National Neurological Institute, 20133 Milan, Italy.
3. Division of Neuroepidemiology, “Carlo Besta” National Neurological Institute, 20133 Milan, Italy.
4. Department of Molecular Biochemistry and Pharmachology, Istituto di Ricerche Farmacologiche “Mario Negri,” 20156 Milan, Italy.
5. Division of Cognitive Disorders, Centro Sant'Ambrogio Fatebenefratelli, Cernusco sul Naviglio, 20063 Milan, Italy.