[1] Rigshosp, Neurobiol Res Unit, Copenhagen Univ Hosp, Copenhagen, Denmark
[2] Rigshosp, CIMBI, Copenhagen Univ Hosp, Copenhagen, Denmark
[3] Univ Copenhagen, Fac Hlth & Med Sci, Copenhagen, Denmark
[4] Med Univ Innsbruck, Innsbruck, Austria
[5] Univ Copenhagen, Dept Comp Sci, Copenhagen, Denmark
[6] Rigshosp, Dept Clin Physiol Nucl Med & PET, Copenhagen Univ Hosp, Copenhagen, Denmark
[7] MGH HMS, Athinoula Martinos Ctr Biomed Imaging, Boston, MA USA