Comparing the effect of three levels of end-expiratory pressure during facemask ventilation on gastric insufflation in patients with obesity: a randomized controlled trial. - Mostafa, Maha; Hasanin, Ahmed; Zakaria, Mohamed M.; Kandel, Hamza; Hamimy, Walid; Abougabal, Ayman; Elshal, Mamdouh M. (Journal of Anesthesia, 2025)