@article{articleb3e914d3,
title   = {Proximal esophageal contraction after induction of ineffective distal contraction by sildenafil in healthy volunteers},
author = {Costa, Tarciana Vieira and Dantas, Roberto Oliveira},
year = {2020},
doi = {10.20524/aog.2019.0443},
journal   = {Annals of Gastroenterology}
}