D. D. Subedi, M. Shrestha, B. Pokharel, P. Regmi, and J. N. Shah, “Endoscopic findings of acid peptic disease at low and high altitude: Kathmandu versus Rasuwa districts of Nepal”, J Patan Acad Health Sci, vol. 9, no. 2, pp. 49–54, Aug. 2022.