O4‐02‐04: EXPLORING GUT MICROBIOTA AS A SOURCE OF POTENTIAL BIOMARKERS: INITIAL RESULTS FROM THE ANAVEX® 2–73 ALZHEIMER'S DISEASE CLINICAL STUDY. (1st July 2019) - Parmentier, Frédéric; Etcheto, Adrien; Missling, Christopher; Williams, Coralie; Afshar, Mohammad