1. Department of Basic and Clinical Neuroscience, Institute of Psychiatry Psychology & Neuroscience, King’s College London , London, SE5 9RX , UK
2. Department of Psychiatry, University of Oxford , Oxford, OX3 7JX , UK
3. Department of Population Health Sciences, King's College London , London, SE1 1UL , UK
4. Netherlands Institute for Neuroscience , 1105 BA Amsterdam , The Netherlands
5. Neurochemistry Lab and Biobank, Department of Clinical Chemistry, Amsterdam Neuroscience, VU University Medical Center , 1007 MB Amsterdam , The Netherlands
6. Department of Psychiatry and Neuropsychology, Alzheimer Center Limburg, School for Mental Health and Neuroscience, Maastricht University , 6200 MD Maastricht , The Netherlands
7. Department of Neurology, Alzheimer Center, VU University Medical Center , 1081 HZ Amsterdam , The Netherlands
8. Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital , S-431 80 Mölndal , Sweden
9. Department of Neurodegenerative Disease, UCL Institute of Neurology , London, WC1N 3BG , UK
10. Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, the Sahlgrenska Academy at the University of Gothenburg , S-431 80 Mölndal , Sweden
11. UK Dementia Research Institute at UCL , London, WC1E 6BT , UK
12. Janssen Medical UK , B-2340 Beerse , Belgium