49 Mutations within PDGFRA showed a trend toward a better prognosis.
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The sentences
59 Despite the overt impact of imatinib on RFS, there were no differences in OS or in imatinib failure-free survival (IFFS) – an innovative end point capturing the time to the development of secondary resistance to imatinib in the metastatic setting – although there was a nonsignificant trend toward IFFS improvement in high-risk patients.