Endoscopic magnet placement into subadventitial tunnels for augmenting the lower esophageal sphincter using submucosal endoscopy: ex vivo and in vivo study in a porcine model (with video). - Dobashi A; Wu SW; Deters JL; Miller CA; Knipschield MA; Cameron GP; Lu L; Rajan E; Gostout CJ (Gastrointestinal endoscopy, 2019)