[1] Univ Munich, Klinikum Grosshadern, Dept Neurol, D-81377 Munich, Germany
[2] Univ Munich, Klinikum Grosshadern, Dept Clin Radiol, D-81377 Munich, Germany
[3] Univ Munich, Klinikum Grosshadern, Dept Nucl Med, D-81377 Munich, Germany
[4] Univ Munich, Klinikum Grosshadern, Dept Internal Med 3, D-81377 Munich, Germany