Correction to: BMC Gastroenterology 20, 134 (2020) https://doi.org/10.1186/s12876-020-01284-1

In this article the affiliation details for Hamid Mehrad were incorrectly given as ‘Private Gastroentrologist, Tehran, Iran' but should have been ‘Department of Internal Medicine, Loghman Hakim Educational Hospital, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran'.

The original article [1] has been updated.