ONLINE DATA SUPPLEMENT

Pigs were then oro-tracheally intubated with a 7.5 mm I.D Hi-Lo® ETT (Mallinckrodt Medical, Athlone, Ireland) and connected to a SERVO-i mechanical ventilator (Maquet, Wayne, NJ. USA). Pigs were mechanically ventilated in volume-control, square-wave inspiratory flow, without inspiratory pause, with a tidal volume (VT) of 10 mg·Kg-1, FIO2 0.4 ... ................
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