P3‐246: Influence of the Retrieval Frequency on the Memory Performance in Elderly Healthy Subjects and Patients with Alzheimer's Disease. (1st July 2016) - Leyhe, Thomas; Saur, Ralf; Wilke, Marko; Erb, Michael; Veil, Cornelia; Scheffler, Klaus; Mychajliw, Christian; Mueller, Stephan