[O4–03–02]: CHOLINERGIC DEFICIT AS A PREDICTOR OF DISEASE PROGRESSION: AMYLOID ACCUMULATION AND EPISODIC MEMORY DECLINE IN A 27‐MONTH PRECLINICAL AD STUDY. (1st July 2017) - Snyder, Peter J.; Santos, Cláudia Y.; Getter, Christine; Schindler, Rachel; Ott, Brian R.; Salloway, Stephen; Yoo, Don C.; Noto, Richard B.; Lim, Yen Ying; Maruff, Paul