Rapid detection of non-small cell lung cancer driver mutations using droplet digital polymerase chain reaction analysis of bronchial washings: a prospective multicenter study.

However, a higher proportion of patients in the serum ddPCR-negative group had non-metastatic disease (M0–1a) compared to the positive group, although the difference did not reach statistical significance (41.2% vs. 16.7%, P=0.34).

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