Comparison of the rate of successful endotracheal intubation between the "sniffing" and "ramped" positions in patients with an expected difficult intubation: a prospective randomized study
Ju-Hwan Lee, Hoe-Chang Jung, Ji-Hoon Shim, Cheol Lee
Korean J Anesthesiol. 2015;68(2):116-121.   Published online 2015 Mar 30     DOI: https://doi.org/10.4097/kjae.2015.68.2.116
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