[1] Univ Hosp Cologne, Dept Neurol, Cologne, Germany
[2] Res Ctr J ulich, Inst Neurosci & Med INM 3, Cognit Neurosci, Julich, Germany
[3] Univ Hosp Bonn, Dept Psychiat & Psychotherapy, Bonn, Germany
[4] German Ctr Neurodegenerat Dis DZNE, Bonn, Germany
[5] Univ Hosp Cologne, Dept Nucl Med, Multimodal Neuroimaging Grp, Cologne, Germany
[6] Univ Hosp Bonn, Dept Neurol, Bonn, Germany
[7] Res Ctr J ulich, Inst Neurosci & Med INM 5, Nuclear Chem, Julich, Germany
[8] Univ Hosp Cologne, Inst Radiochem & Expt Mol Imaging, Cologne, Germany
[9] Univ Hosp Cologne, Dept Psychiat, Cologne, Germany