[1] Univ Hosp Bonn, Bonn, Germany
[2] Forschungszentrum Julich, D-52425 Julich, Germany
[3] German Ctr Neurodegenerat Dis DZNE, Bonn, Germany
[4] Life & Brain Res Ctr, Bonn, Germany
[5] Ruhr Univ Bochum, St Josef Hosp, Bochum, Germany
[6] Univ Bonn, Bonn, Germany
[7] Max Planck Inst Neurol Res, D-50931 Cologne, Germany