P3‐281: Altered Functional Connectivity of the Default Mode Network in Alzheimer's Dementia and Mild Cognitive Impairment: Results From a Large‐Scale Multicenter Resting‐State Fmri Study. (1st July 2016) - Wohlert, Alexandra; Dyrba, Martin; Heine, Christina; Grothe, Michel J.; Grimmer, Timo; Sorg, Christian; Ewers, Michael; Meisenzahl, Eva; Klöppel, Stefan; Borchardt, Viola; Walter, Martin; Teipel, Stefan J.