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. 2021 Feb;9(4):323. doi: 10.21037/atm-20-5723

Figure 1.

Figure 1

Flowchart of data processing. ICU, intensive care unit; AKI, acute kidney injury; RBC, red blood cell; BUN, blood urea nitrogen; INR, international normalized ratio; SOFA, Sequential Organ Failure Assessment; SAPS II, Simplified Acute Physiology Score II; APACHE, Acute Physiology and Chronic Health Evaluation.