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A. The median KRASG12/G13 copy numbers in urine at baseline (8.6), on therapy (0), and at disease progression (6.9) differed significantly (P = 0.002). B. The median KRASG12/G13 copy numbers in plasma at baseline (488.5), during therapy (11.0), and at disease progression (258.6) also differed significantly (P < 0.001).
