NAQI, S A, et al. “Gastro Esophageal Reflux Disease: Incidence of GERD in 100 Consecutive Upper G.I. Endoscopies at S.G.R.H”. Annals of King Edward Medical University, vol. 5, no. 2, June 2020, pp. 165-6, doi:10.21649/akemu.v5i2.3320.