Baseline and Longitudinal Microbial Changes Predict Response to Rifaximin and/or Diet Low in Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyols in Irritable Bowel Syndrome: 496. (October 2019) - Lee, Allen; Rao, Krishna; Haller, Emily; Van Dam, Lauren; Baker, Jason; Watts, Lydia; Eswaran, Shanti; Chey, William D.; Owyang, Chung; Young, Vincent; Hasler, William