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The concentrations (µg/g) of regorafenib in different organs were collected after oral administration for 4 h. The regimens included (A) RT2 Gy × 1 f’x and RT2 Gy × 3 f’x or (B) RT9Gy × 1 f’x and RT9 Gy × 3 f’x, with or without regorafenib, at a dose of 16 mg/kg, concurrently or sequentially. Data are expressed as the mean ± SEM (n = 6 for each group).
