Changes of functional and directed resting-state connectivity are associated with neuronal oscillations, apoE Genotype and amyloid deposition in mild cognitive impairment - Michels, L; Muthuraman, M; Anwar, A R; Kollias, S; Leh, S E; Riese, F; Unschuld, P G; Siniatchkin, M; Gietl, A F; Hock, C (Front Aging Neurosci, 2017)