Efficiency of 80% vs. 100% Oxygen for Preoxygenation: A Randomized Study on Duration of Apnoea Without Desaturation. - Jung, Jaewoong; Chung, Yang-Hoon; Koo, Bon-Sung; Kim, Sang-Hyun; Jin, Hee-Chul; Chae, Won Seok (Journal of Clinical Medicine, 2025)