A Pilot Study to Evaluate the Safety, Tolerance, and Efficacy of a Novel Stationary Antral Balloon (SAB) for Obesity - Lopasso, Fabio Pinatel; Sakai, Paulo; Gazi, Bashir M.; Artifon, Everson L. A.; Kfouri, Christiane; Souza, Jussara P. B.; Kumar, Atul (Journal of Clinical Gastroenterology, 2008)