Fig. 6

(A) ROC curve assessment of serum GPX4 levels to differentiate between ARCO stage 2 and stage 3; (B) ROC curve assessment of serum GPX4 levels to differentiate between ARCO stage 3 and stage 4; (C) ROC curve assessment of serum SLC7A11 levels to differentiate between ARCO stage 2 and stage 3; (D) ROC curve assessment of serum SLC7A11levels to differentiate between ARCO stage 3 and stage 4