Giancarlo Logroscino1, Albert Ludolph2. 1. Neurodegenerative Diseases Unit, Department of Basic Medicine, Neuroscience and Sense Organs, Department of Clinical Research in Neurology of the University of Bari at Pia Fondazione Card G Panico, Hospital Tricase, University Aldo Moro, Bari 73 039, Italy. Electronic address: giancarlo.logroscino@uniba.it. 2. Department of Neurology, University of Ulm, Ulm, Germany.