Correlation of total CD34⁺collection with participant CD34⁺cells/µL, age, and sex. (A) Association of preapheresis CD34⁺ cells/µL to total CD34⁺ cells/kg. (B) Association of age with total CD34⁺ cells/kg. (C) Median CD34⁺ cell/kg for males vs females. Median values with 95% confidence interval shown. □, Participants on chronic transfusion and hydroxyurea (HU); ○, participants on chronic transfusions; ●, participants on HU.