Mucosal visibility during gastroscopy: Comparison between simethicone and simethicone+N- acetylcysteine+sodium bicarbonate - Tuul, E; Otgondemberel, B; Soltan, A; Enkhbayar, T; Chuluunbaatar, B; Batsaikhan, A; Davaadorj, E; Battsetseg, B; Oyunaa, L; Erdenebayar, O E; Davaanyam, B (Endoscopy, 2025)