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Disease-free survival (DFS) and overall survival (OS) by route of busulfan administration. Survival outcomes were similar for patients receiving either intravenous (i.v.) or oral busulfan [DFS i.v. busulfan HR 1.1 (95% CI 0.59, 2.08), p = 0.76; OS i.v. busulfan HR 1.24 (95% CI 0.63, 2.42), p = 0.534].
