[1] Univ Bari, Dept Neurol & Psychiat Sci, I-70124 Bari, Italy
[2] NIA, Mol Genet Unit, Neurogenet Lab, NIH, Bethesda, MD 20892 USA
[3] NINDS, Human Motor Control Sect, NIH, Bethesda, MD 20892 USA
[4] IRCCS CSS Mendel Inst, Neurogenet Unit, Rome, Italy
[5] Univ Genoa, Dept Neurosci Ophthalmol & Genet, I-16126 Genoa, Italy
[6] Univ Messina, Dept Neurosci Psychiat & Anesthesiol, I-98100 Messina, Italy
[7] Univ Roma La Sapienza, Dept Neurol Sci, Rome, Italy
[8] Univ Roma La Sapienza, NEUROMED Inst, Rome, Italy