Dopaminergic Gene Polymorphisms Affect Long-term Forgetting in Old Age: Further Support for the Magnification Hypothesis. - Goran Papenberg; Lars Bäckman; Irene E. Nagel; Wilfried Nietfeld; Julia Schröder; Lars Bertram; Hauke R. Heekeren; Ulman Lindenberger; Shu-Chen Li (J. Cogn. Neurosci., 2013)