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1文献来源 Becker A, Crombag L, Heideman DA, et al. Retreatment with Erlotinib: Regain of TKI sensitivity following a drug holiday for patients with NSCLC who initially responded to EGFR-TKI treatment [J]. Eur J Cancer, 2011,47(17) :2603-2606.2 证据水平