1. Department of Neurology; University Medical Center Goettingen; Goettingen Germany
2. Research Unit Analytical BioGeoChemistry; German Research Center for Environmental Health; Helmholtz Zentrum Muenchen; Neuherberg Germany
3. Department of Medical Statistics; University Medical Center Goettingen; Goettingen Germany
4. DZNE; German Center for Neurodegenerative Diseases Goettingen; Goettingen Germany
5. Cluster of Excellence Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB); Goettingen Germany
6. Department of Neurology; Ruhr-University Bochum; St. Josef-Hospital; Bochum Germany