Effect of icotinib on advanced lung adenocarcinoma patients with sensitive <i>EGFR</i> mutation detected in ctDNA by ddPCR.

"Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at http://dx.doi.org/10.21037/tcr.2019.10.48). The authors have no conflicts of interest to declare."

"Funding: This work was supported by National Natural Science Foundation of China ( 31871402 ), Science and Technology Planning project of Zhejiang Province ( LGF19H160002 ), Medical Scientific Research Foundation of Zhejiang Province of China ( 2019RC027 ), Scientific research foundation of Zhejiang Medical Association ( 2018ZYC-B5 ), Science and Technology Bureau Project of Jiaxing City of Zhejiang Province ( 2016AY23087 , 2017BY1850 , 2018AD32163 , 2019AD32266 , 2019AD32097 ), and Xisike-Hanson Cancer Research Foundation ( Y-HS2019-20 )."