title: A patient with Dysphagia associated with opioid medication.
authors.affiliation: Asan Digestive Disease Research Institute, Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
authors.forename: Kee Wook
authors.initials: KW
authors.lastname: Jung
authors.forename: Seung-Jae
authors.initials: SJ
authors.lastname: Myung
authors.forename: Hwoon-Yong
authors.initials: HY
authors.lastname: Jung