1. Alzheimer's Disease and Other Cognitive Disorders Unit Hospital Clínic Fundació Clínic per a la Recerca Biomèdica Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) Universitat de Barcelona Barcelona Spain
2. Medical Statistics Core Facility Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) and Hospital Clínic Barcelona Spain
3. Biostatistics Unit Faculty of Medicine Universitat Autònoma de Barcelona Barcelona Spain
4. Biochemistry and Molecular Genetics Department Biomedical Diagnostic Center, Hospital Clínic Barcelona Spain
5. Department of Psychiatry and Neurochemistry Institute of Neuroscience and Physiology The Sahlgrenska Academy at the University of Gothenburg Mölndal Sweden
6. Clinical Neurochemistry Laboratory Sahlgrenska University Hospital Mölndal Sweden
7. Department of Neurodegenerative Disease University College London London UK
8. UK Dementia Research Institute at UCL London UK