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We investigated the effect of downstaging on OS in LD-SCLC patients treated with first-line treatment.We retrospectively reviewed 210 LD-SCLC patients who were treated with first-line treatment at Seoul National University Hospital between April 1999 and November 2012. Compared with initial tumor, node, metastases (TNM) stage, cases that showed a lower TNM stage after treatment were defined as ‘downstaging...
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