Affiliation: | a B.B. Brodie Department of Neuroscience, University of Cagliari, Monserrato, Italy b Consiglio Nazionale delle Ricerche, Neuroscience Institute, Cagliari, Italy c Unité Neurobiologie Intégrative des Systèmes Cholinergiques, Centre National de la Recherche Scientifique, Institut Pasteur, Paris, France d Division of Geriatric Medicine and Gerontology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland e Preclinical Pharmacology Section, Behavioral Neuroscience Research Branch, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Department of Health and Human Services, Baltimore, Maryland |