1. Alzheimer Center Amsterdam, Department of Neurology, Amsterdam Neuroscience, Amsterdam UMC Vrije Universiteit Amsterdam Amsterdam the Netherlands
2. Clinical Neurochemistry Lab, Institute of Neuroscience and Physiology Sahlgrenska University Hospital Mölndal Sweden
3. Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology University of Gothenburg Mölndal Sweden
4. Nivel the Netherlands
5. Alzheimer Center Limburg, School for Mental Health and Neuroscience Maastricht University Maastricht the Netherlands
6. Center for Research and Advanced Therapies CITA‐Alzheimers Foundation Donostia‐San Sebastian Spain
7. Geriatric Psychiatry, Department of Mental Health and Psychiatry Geneva University Hospitals Geneva Switzerland
8. Department of Psychiatry University Hospital of Lausanne Lausanne Switzerland
9. 1st Department of Neurology, AHEPA University Hospital, Medical School, Faculty of Health Sciences Aristotle University of Thessaloniki Makedonia Thessaloniki Greece
10. Neurology Service University Hospitals Leuven Leuven Belgium
11. Laboratory for Cognitive Neurology, Department of Neurosciences KU Leuven Leuven Belgium
12. Department of Neurobiology, Care Sciences and Society, Division of Neurogeriatrics Karolinska Institutet Stockholm Sweden
13. School of Medical Sciences Örebro University and Dep of Psychiatry Örebro University Hospital Örebro Sweden
14. Janssen‐cilag High Wycombe UK
15. (at the time of study conduct) University of Oxford Oxford UK
16. formerly Janssen R&D, LLC, Beerse, Belgium (at the time of study conduct) AC Immune SA Lausanne Switzerland
17. Department of Biomedical Sciences University of Antwerp Antwerp Belgium
18. Lübeck University Lübeck Germany
19. Center for Lifespan Changes in Brain and Cognition (LCBC), Department of Psychology University of Oslo Oslo Norway
20. Institute of Clinical Medicine, Neurology University of Eastern Finland Kuopio Finland
21. Institute of Clinical Medicine Internal Medicine and Kuopio University Hospital University of Eastern Finland Kuopio Finland
22. Department of Neurodegenerative Disease UCL Institute of Neurology London UK
23. UK Dementia Research Institute London UK
24. Neurochemistry Lab, Department of Clinical Chemistry, Amsterdam Neuroscience, Amsterdam UMC Vrije Universiteit Amsterdam the Netherlands