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Estimated relative risk (RR) of basal cell carcinoma (BCC) in irradiated (TBI) patients as a function of attained age, age at hematopoietic cell transplant (HCT), and type of TBI [single dose: solid lines (solid circle for HCT Age 60); fractionated dose: dashed lines]. RR decreased significantly with increasing age at HCT but did not vary significantly with attained age or between single and fractionated exposures. Panel A: Linear-linear; panel B: log-linear.
