1. Alzheimer Center; Greek Psychogeriatric Association "Nestor"; Athens Greece
2. First Department of Neurology, Aeginition Hospital, Medical School; National and Kapodistrian University of Athens; Athens Greece
3. Neuropsychology Section, Department of Neurology, Medical School; University of Patras; Patras Greece
4. First Department of Psychiatry, Aeginition Hospital, Medical School; National and Kapodistrian University of Athens; Athens Greece