R2* values of dentate nuclei of 9 individual FA patients undergoing treatment with deferiprone (20-30 mg/kg/d) for up to 6 months. Mean R₂* constants (in s⁻¹) of dentate nuclei of individual FA patients (A-I) were obtained at the indicated month of treatment (1- to 2-month intervals) as described in “Patients, materials, and methods.”