The integrity of the cholinergic system determines memory performance in healthy elderly. - Nils Richter; Inka Allendorf; Özgür A. Onur; Lutz Kracht; Markus Dietlein; Marc Tittgemeyer; Bernd Neumaier; Gereon R. Fink; Juraj Kukolja (NeuroImage, 2014)