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Box-and-whisker plot (median, IQR, and range) of visual analog scale scores for difficulty of simulated tracheal intubation in hematemesis and vomitus settings using each laryngoscope. (a) Normal setting, (b) hematemesis setting, and (c) vomitus setting. Results are expressed as means ± SDs and were analyzed using one-way analysis of variance. AWS, Pentax-AWS Airwayscope; McGRATH, McGRATH MAC; McL, Macintosh laryngoscope.
