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(a) Carcinoma recurrence (CR) rate of PTC patients aged 45 years or older and those younger than 45 years. (b) Carcinoma death (CD) rates of PTC patients aged 45 years or older and those younger than 45 years. (c) CR rates of PTC patients aged 55 years or older and those younger than 45 years. (d) CD rates of PTC patients aged 55 years or older and those younger than 45 years.
