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Kaplan-Meier curves of all-cause mortality in 220 type 1 diabetic patients in accordance with a vitamin D level equal to and below or above the lower 10% percentile, 25(OH)D3 = 15.5 nmol/L. Full black line, 25(OH)D3 >15.5 nmol/L; dashed black line, 25(OH)D3 ≤15.5 nmol/L.
