1. Department of Morphological and Biomedical Sciences, Anatomy and Histology Section, University of Verona, Verona, Italy.
2. Department of Animal Biology, Laboratory of Cell Biology and Neurobiology, University of Pavia, Pavia, Italy.
3. Neurobiology of Aging Laboratory, National Institute of Hospitalization and Care for the Elderly (INRCA), Ancona, Italy.