Funding for this research was provided by:
China Scholarship Council (CSC201706240094)
Roy Castle Lung Cancer Foundation
West China-Liverpool Clinician-Scientist Leadership Scholarship
1.3.5 Project for Disciplines of Excellence, West China Hospital. Sichuan University (ZYJC18001)
Transformation Projects of Sci-Tech Achievements of Sichuan Province (2016CZYD0001)
National Key Development Plan for Precision Medicine Research (2017YFC0910004)
Received: 6 March 2019
Accepted: 31 October 2019
First Online: 8 November 2019
Ethics approval and consent to participate
: Ethical approval and consent had been obtained in the original studies. They were not required in the current study because it was a secondary anonymised analysis of the original publications.
: No consent for publication was required due to curation of data from published papers.
: The authors declare that they have no competing interests.