Efficacy and Safety of Tenapanor in Patients With Constipation Predominant Irritable Bowel Syndrome: A 12‐week, Double‐Blind, Placebo‐Controlled, Randomized Phase 3 Trial: 421. (October 2017) - Chey, William D.; Lembo, Anthony J.; Korner, Paul; Yan, Andrew; Rosenbaum, David P.