Serum ferritin (μg/L) level for deferiprone and deferoxamine groups for the ITT population. (A) Mean serum ferritin over time. Data are shown as means with error bars showing SD. (B) Mean change in serum ferritin level from baseline at month 12. Data are shown as means with error bars showing SE. A t test was used to calculate the P value. Serum ferritin was measured via blood test at month 3, month 6, month 9, and month 12.