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Phe value for predicting the endpoint. Phe, phenylalanine; HF, heart failure; AF, atrial fibrillation; Tertile 1, low Phe, Phe ≤ 80.94 mmol/L; Tertile 2, intermediate Phe, 81.07 mmol/L ≤ Phe ≤ 103.97 mmol/L; Tertile 3, high Phe, Phe ≥ 104.05 mmol/L. (A,B) HF patients; (C,D) HF patients with AF.
