Division of Gastroenterology;
Universidad de La Sabana;
Advanced Gastrointestinal Endoscopy;
EmuraCenter LatinoAmerica;
Emura Foundation for the Promotion of Cancer Research;
Unidad de Endoscopia Digestiva;
Clínica Pediátrica Colsanitas;
Division of Digestive Diseases and Nutrition;
Morsani College of Medicine;
University of South Florida;
Division of Gastroenterology;
North Shore-Long Island Jewish Medical Center;
Unidad de Exploraciones Digestivas;
Clinica Universitaria Colombia;
Department of Gastroenterology and Hepatology;
Mayo Clinic;
Department of Internal Medicine. Universidad de La Sabana;
Division of Interventional Pulmonology;
Fundacion Neumologica Colombiana;
Esophagus; Natural; landmark; Radial; orientation; Longitudinal; orientation; Four-quadrants; Left; main; bronchus; Left; atrium;