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Additional file 4. Forest plot of the effect of intravenous ascorbic acid administration on the number of patients suffered from AKI.

Additional file 3. Forest plot of the effect of IV AA on the urine output in the first 24Â h of admission when removing the trials of Zabet [16].

Additional file 1. Forest plot of the effect of IV AA on mortality at the final follow-up when compared by administration of AA alone or in combination with other antioxidant agents.

Additional file 2. Forest plot of the effect of IV AA on mortality at the final follow-up in the subgroup of sepsis by removing the trial of Galley.