1 Istituto di Neurologia, Universita Cattolica del Sacro Cuore, Milano, Italy
2 Neurologia I, Istituto Neurologico Carlo Besta, Milano, Italy
3 Department of Neurological Sciences, Rush Medical College, Chicago, Illinois, USA
4 Department of Neurology, Emory University, Atlanta, Georgia, USA
5 Department of Human Genetics, Emory University, Atlanta, Georgia, USA
6 Department of Pediatrics, Emory University, Atlanta, Georgia, USA
7 Department of Neurology, University of Rochester Medical Center, Rochester, New York, USA
8 Department of Neurology, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
9 Department of Neurology, Pitie-Salpetrie`re Hospital, Paris, France
10 Department of Neurology, University of Wurzburg, Wurzburg, Germany
11 Reta Lila Weston Institute of Neurological Studies, University College London (UCL) Institute of Neurology, London, United Kingdom
12 Department of Psychiatry, Maastricht University Medical Center, Maastricht, the Netherlands
13 Alzheimer Disease Research Unit and Centro de Investigacion Biomedica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Alzheimer Center Reina Sofia Foundation, Carlos III Institute of Health, Madrid, Spain
14 Department of Neurological Sciences, Rush University Medical Center, Chicago, Illinois, USA
15 Department of Clinical Neurosciences, Royal Free Hospital, University College London, London, UK