1 Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari "Aldo Moro", Bari, Italy.
2 Institut de Biologie-Biology of Adaptation and Aging (B2A), Université Pierre et Marie Curie Paris 6, Paris, France.
3 Department of Clinical Neurosciences-Division of Stem Cell Neurobiology, Wellcome Trust-Medical Research Council Stem Cell Institute and NIHR Biomedical Research Centre, University of Cambridge, Cambridge, UK.
4 Biomedical Section, Tecnologica Research Institute, Crotone, Italy.