[1] Univ Med Ctr, Clin Dementia Ctr, Dept Neurol, Robert Koch Str 40, D-37075 Gottingen, Germany
[2] Univ Med Ctr, Natl Reference Ctr CJD Surveillance, Robert Koch Str 40, D-37075 Gottingen, Germany
[3] German Ctr Neurodegenerat Dis DZNE, Gottingen, Germany
[4] Univ Med Ctr Gottingen, Dept Med Stat, Humboldtallee 32, D-37073 Gottingen, Germany
[5] Neurol Gemeinschaftspraxis Groner Tor, Gottingen, Germany
[6] Univ Med Ctr, Dept Psychiat & Psychotherapy, Von Siebold Str 5, D-37075 Gottingen, Germany