3892537 AKI-RRT acute kidney injury requiring renal replacement therapy 10 3892541 AKI-RRT AKI requiring renal replacement therapy 6 3892542 AKI-RRT AKI requiring RRT 3 3892540 AKI-RRT acute kidney injury needing prolonged renal replacement therapy 1 3892544 AKI-RRT AKI on RRT 1 3892543 AKI-RRT AKI patients who received renal replacement therapy 1 3892539 AKI-RRT AKI treated with RRT 1 3892538 AKI-RRT AKI who required RRT 1