1. Laboratory of Neurochemistry, Fondazione S.Lucia IRCCS, Rome, Italy.
2. Department of Physiological, Biochemical and Cell Science, University of Sassari, Sassari, Italy.
3. Institute of Neuroscience, Department of Psychobiology and Psycopharmacology, CNR, Rome, Italy.
4. Department of Biology, University of Rome “Tor Vergata”, Rome, Italy.