Direct versus indirect epiglottis elevation in cervical spine movement during videolaryngoscopic intubation under manual in-line stabilization: a randomized controlled trial. - Choi, Seungeun; Lee, Dong Ju; Shin, Kyung Won; Kim, Yoon Jung; Park, Hee-Pyoung; Oh, Hyongmin (BMC Anesthesiology, 2023)