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(A) KRASG12/G13 mutant allele frequencies (MAFs) at baseline (median, 0.50%), during therapy (median, 0.22%), and at disease progression (median, 1.13%) differed significantly (P = 0.04). (B) KRASG12/G13 copy numbers at baseline (median, 14), during therapy (median, 17), and at disease progression (median, 273) differed significantly (P = 0.03).
