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表皮生长因子受体外显子19缺失患者与外显子21 L858R突变患者的无进展生存期比较（11个月vs 8.7个月，P=0.138)
Progression-free survival (PFS) in epidermal growth factor receptor (EGFR) exon 19 delete and exon 21 L858R mutation patients (11.0 months vs 8.7months, P=0.138)
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