Ackerman SJ, Kagalwalla AF, Hirano I, Gonsalves N, Katcher PM, Gupta S, Wechsler JB, Grozdanovic M, Pan Z, Masterson JC, Du J, Fantus RJ, Alumkal P, Lee JJ, Ochkur S, Ahmed F, Capocelli K, Melin-Aldana H, Biette K, Dubner A, Amsden K, Keeley K, Sulkowski M, Zalewski A, Atkins D, Furuta GT. One-Hour Esophageal String Test: A Nonendoscopic Minimally Invasive Test That Accurately Detects Disease Activity in Eosinophilic Esophagitis. Am J Gastroenterol. 2019 10; 114(10):1614-1625.