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Event‐free survival in patients with aggressive B‐cell lymphoma according to 25(OH)D levels following supplementation. The survival analysis was restricted to 68 patients treated with R‐CHOP containing full dose of doxorubicin, according to 25(OH)D levels. Group A (n = 36 patients) had normal (≥30 ng/mL), and group B lower than normal (<30 ng/mL) 25(OH)D levels after loading phase. The survival difference is statistically significant (P = 0.02).
