TY - JOUR AU - Lippincott, Michelle AU - Velanovich, Vic PY - 2021 TI - The upper esophageal sphincter in gastroesophageal reflux disease JF - Annals of Esophagus; Vol 5 (September 25, 2022): Annals of Esophagus Y2 - 2021 KW - N2 - UR - https://aoe.amegroups.org/article/view/6065