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MC and impending or established secondary GF stratified based on day 0 alemtuzumab levels. (A) Cumulative incidence of MC, defined as donor chimerism <95%. (B) Cumulative incidence of impending or established secondary GF. Stratification using the first quartile day 0 alemtuzumab levels (level ≤ 0.32 μg/mL). D0, day 0.
