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The subscales of mental task load evaluated with NASA-TLX. Forty-seven otolaryngologists performed ESS for 3D-printed sinus models and evaluated their mental workload during ESS, in a point of mental demand, physical demand, performance, effort, and frustration. ESS, endoscopic sinus surgeries; NASA-TLX, national aeronautics and space administration-task load index. ***p < 0.001.
