1. The history and future of implantation therapy for gastroesophageal reflux disease 
Glen A Lehman, MD 
Gastrointestinal Endoscopy Clinics 
Volume 13, Issue 1, Pages (January 2003)
DOI: /S (02)

2. 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  , DOI: ( /S (02) )