The American Society for Gastrointestinal Endoscopy PIVI (Preservation and Incorporation of Valuable Endoscopic Innovations) on peroral endoscopic myotomy
Gastrointest Endosc. 2015 May;81(5):1087-100.e1.
doi: 10.1016/j.gie.2014.12.007.
Epub 2015 Mar 19.