%0 Journal Article %T Endoscopic identification of endoluminal esophageal landmarks for radial and longitudinal orientation and lesion location %A Carlos Rodriguez-Reyes %A Fabian Emura %A Javier Preciado %A Luis Giraldo-Cadavid %A Michael Wallace %A Petros Benias %A Rene Gomez-Esquivel %J Archive of "World Journal of Gastroenterology". %D 2019 %R 10.3748/wjg.v25.i4.498 %K Esophagus %K Natural landmark %K Radial orientation %K Longitudinal orientation %K Four-quadrants %K Left main bronchus %K Left atrium %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6350169/