1 Life, Health and Environmental Science Department, University of L'Aquila, 67100 L'Aquila, Italy ; Neuropsychology Unit, IRCCS Santa Lucia Foundation, 00179 Rome, Italy.
2 Life, Health and Environmental Science Department, University of L'Aquila, 67100 L'Aquila, Italy.
3 School of Life & Health Sciences, Aston University, Birmingham, West Midlands B15, UK.
4 Division of Behavioral Neurology, Department of Neurology and Alzheimer's Disease Research Center, National Cheng Kung University Hospital, Institute of Gerontology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan.