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The given text is a formula used to estimate the Glomerular Filtration Rate (GFR) for a patient. GFR is a measure of how well the kidneys are functioning. The formula calculates cLcr (creatinine clearance) value using the patient's age, weight, and serum creatinine level (which indicates how much creatinine is in their blood, another measure of kidney function). This formula is commonly used in clinical settings to monitor and assess kidney function in patients.*