The PAR was implemented in an Italian Foundation with an important tradition of caring for persons with degenerative diseases. It hosts around 800 patients, 300 of whom are neurodegeneratively diseased elderly people. The Alzheimer's Unit, housed in the geriatric ward, consists of three services: Alzheimer's Diagnostic Unit (about 150 people assessed yearly), Alzheimer's Daytime Center (15 spaces) and Alzheimer's Residential Unit (20 spaces). Overall in the Alzheimer's Unit, 24 doctors and nurses have permanent positions. The principal features of Alzheimer's disease are elaborated in the list below: