The history and future of implantation therapy for gastroesophageal reflux disease Glen A Lehman, MD Gastrointestinal Endoscopy Clinics Volume 13, Issue 1, Pages 157-165 (January 2003) DOI: 10.1016/S1052-5157(02)00117-4
Fig. 1 Reflux episodes during 16 stress maneuvers in standard acid reflux test. End RX, end therapy; Pre Inj, preinjection; SD, standard deviation. From O'Connor KW, Lehman GA. Endoscopic placement of collagen at the tower esophageal sphincter to inhibit gastroesophageal reflux: a pilot study of 10 medically intractable patients. Gastrointest Endosc 1988;34:106. Gastrointestinal Endoscopy Clinics 2003 13, 157-165DOI: (10.1016/S1052-5157(02)00117-4)