Esophagogastric junction outflow obstruction in the differential diagnosis of post-fundoplication dysphagia in children D.C. Godoy-Salgado; E.M. Toro-Monjaraz; T. Padilla-Cortés; J.F. Cadena-León; F. Zárate-Mondragón; A. Loredo-Mayer; K. Ignorosa-Arellano; R. Cervantes-Bustamante; J.A. Ramírez-Mayans;