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Kaplan–Meier survival curves for A: 0–12 years with C1M levels divided into quartiles (Q1 (lowest), Q2, Q3 and Q4). Black: Q1, dark gray: Q2, gray: Q3, light gray: Q4; B: 0–3 years, C: 3–6 years, D: 6–9 years and E: 9–12 years with C1M levels divided into Q1–Q3 (pooled) and Q4 (upper quartile). Black: Q1–Q3, light gray: Q4. *p < 0.05, **p < 0.01, ***p < 0.001, ns = not significant.
