1. Center for Research and Advanced Therapies, CITA-Alzheimer Foundation, Donostia-San Sebastian, Gipuzkoa, Spain
2. Gipuzkoa Primary Care – Integrated Health Care Organizations Research Unit, Alto Deba Integrated Health Care Organisation, Nafarroa Hiribidea, Arrasate, Gipuzkoa, Spain
3. Biodonostia Health Research Institute, Paseo Doctor Begiristain, Donostia, San Sebastian, Spain
4. Department of Nursing II, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Spain
5. Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden
6. Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
7. Department of Neurodegenerative Disease, UCL Institute of Neurology, London, United Kingdom
8. UK Dementia Research Institute at UCL, London, United Kingdom
9. Central Analysis Service, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Bizkaia, Spain
10. Aston Medical Research Institute, Aston Medical School, Aston University, Birmingham, UK
11. Departamento de Bioquímica, University of the Basque Country (UPV/EHU) and Instituto Biofisika (CSIC, UPV/EHU), Leioa, Bizkaia, Spain