1 Harald Hampel, MD, PhD, MA, MSc, AXA Research Fund and Sorbonne University Chair, Sorbonne University, Department of Neurology, Institute of Memory and Alzheimer's Disease (IM2A), Brain and Spine Institute (ICM), François Lhermitte Building, Pitié-Salpêtrière Hospital, 47 Boulevard de l'hôpital, 75651 Paris CEDEX 13, France, Phone : +33 1 42 16 75 15, Fax: +33 1 42 16 75 16, E-Mail: harald.hampel@icm-institute.org.