1. Neurochemistry LaboratoryDepartment of Clinical Chemistry, Amsterdam NeuroscienceVU University Medical Center, Amsterdam UMCAmsterdamthe Netherlands
2. Alzheimer Center AmsterdamDepartment of Neurology, Amsterdam NeuroscienceVrije Universiteit Amsterdam, Amsterdam UMCAmsterdamthe Netherlands
3. Department of Neurology, Spaarne Gasthuis location HaarlemHaarlemthe Netherlands
4. Department of Epidemiology and BiostatisticsVrije Universiteit Amsterdam, Amsterdam UMCAmsterdamthe Netherlands
5. Department of Psychiatry and NeuropsychologyMaastricht University, School for Mental Health and Neuroscience, Alzheimer Center LimburgMaastrichtthe Netherlands