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(A) ΔPes changes from baseline within the first 2 hours of NIV for the whole population and according to NIV outcome at 24 hours. (B) ΔPl changes from baseline within the first 2 hours of NIV for the whole population and according to NIV outcome at 24 hours. ΔPes = tidal change in esophageal pressure; ΔPl = tidal change in transpulmonary pressure; NIV = noninvasive mechanical ventilation.
