References
1. Holinger PH. Arch Otolaryngol. 1948;47:119-26.
2. Yadlapati R et al. Clin Gastroenterol Hepatol. 2017;15:1708-14.e3.
3. Oversight Working Network et al. Gastrointest Endosc. 2014;80:16-27.
4. DeLay K et al. Am J Gastroenterol. 2020;115:1453-9.
5. Gyawali CP et al. Neurogastroenterol Motil. 2018;30(9):e13341.
6. Yadlapati R et al. Gastroenterology. 2020;158:1202-10.