Circulating tumor cells detected only after surgery for non-small cell lung cancer: is it a predictor of recurrence? - Sawabata, Noriyoshi; Nakamura, Toshitaka; Kawaguchi, Takeshi; Watanabe, Takashi; Ouji, Noriko Sageshima; Ito, Toshihiro; Taniguchi, Shigeki (Journal of Thoracic Disease, 2020)