1 Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.
2 Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden.
3 Banner Alzheimer's Institute, Phoenix, Arizona, USA.
4 Banner Sun Health Research Institute, Sun City, Arizona, USA.
5 Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.
6 Hospital del Mar Research Institute, Barcelona, Spain.
7 Servei de Neurologia, Hospital del Mar, Barcelona, Spain.
8 Department of Neurodegenerative Disease, Institute of Neurology, UCL, London, UK.
9 UK Dementia Research Institute, UCL, London, UK.
10 Hong Kong Center for Neurodegenerative Diseases, Clear Water Bay, Hong Kong, China.
11 Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.