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(A) Number of patients with SNHL (Chang grade > 0) or normal hearing grouped by age at initiation of RT (years) (N = 235). (B) Number of patients with SNHL (Chang grade > 0) or normal hearing grouped by cochlear radiation dose (Gy), which refers to the higher cochlear dose that a patient received between the left and right ears (N = 235). RT, radiation therapy; SNHL, sensorineural hearing loss.
