Traditional Chinese medicine for smoking cessation: An umbrella review of systematic reviews and meta-analysis of randomized controlled trials.

"CONFLICTS OF INTEREST The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. The authors declare that they have no competing interests, financial or otherwise, related to the current work. C.L. Lu, X.H. Liu and J.P. Liu report that they received funding from the National Administration of Traditional Chinese Medicine to conduct research. J.P. Liu also reports that since the initial planning of the work, the Center for Evidence-Based Chinese Medicine, Beijing University of Chinese Medicine received funding by the National Key Research and Development Project."

"FUNDING This work is supported by the National Key Research and Development Project: Adding Chinese herbal medicine to antibiotic treatment for acute exacerbation of chronic obstructive pulmonary disease (Grant No. 2018YFE0102300). JP Liu, CL Lu, and XH Liu, are supported by Innovation Team and Talents Cultivation Program of National Administration of Traditional Chinese Medicine (No: ZYYCXTD-C-202006)."

"This study followed the methodological process of the Joanna Briggs Institute for an ‘umbrella review’ (a re-evaluation of SRs). Compared with typical SRs, an umbrella review can synthesize evidence at a higher-level and better identify uncertainties, biases, and knowledge gaps,. This study was registered on INPLASY (202190001), and reported following PRISMA-2020."