Ravula, Ramakrishna, Rabbani Tappa, and Nirmala Jonnavithula. 2023. “Influence of Head Rotation on Ease of Mask Ventilation: A Randomized Crossover Study”. International Journal of Research in Medical Sciences 11 (9):3260-63. https://doi.org/10.18203/2320-6012.ijrms20232778.