Sullivan S, Swain J, Woodman G, Edmundowicz S, Hassanein T, Shayani V, Fang JC, Noar M, Eid G, English WJ, Tariq N, Larsen M, Jonnalagadda SS, Riff DS, Ponce J, Early D, Volckmann E, Ibele AR, Spann MD, Krishnan K, Bucobo JC, Pryor A. Randomized sham-controlled trial of the 6-month swallowable gas-filled intragastric balloon system for weight loss. Surg Obes Relat Dis. 2018 Dec; 14(12):1876-1889.