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Values of oxygen requirement (inspirational oxygen fraction (FiO2)) on day 0 (baseline), day 1, and day 2 following treatment with hydrocortisone (HC). *P < 0.05 versus day 0 (baseline) and day 1. NS = non significant. FiO2 significantly decreases after day 2 compared with day 0 (baseline) and between day 1 and day 2.
