Copyright
©The Author(s) 2021.
World J Meta-Anal. Aug 28, 2021; 9(4): 353-376
Published online Aug 28, 2021. doi: 10.13105/wjma.v9.i4.353
Published online Aug 28, 2021. doi: 10.13105/wjma.v9.i4.353
Figure 1 Flowchart of literature search.
The flowchart shows, for each of the four stages of the process, the numbers of papers and meta-analyses considered, together with the numbers of papers meeting the selection criteria or rejected, with reasons for rejection shown.
- Citation: Lee PN, Hamling JS, Coombs KJ. Systematic review with meta-analysis of the epidemiological evidence in Europe, Israel, America and Australasia on smoking and COVID-19. World J Meta-Anal 2021; 9(4): 353-376
- URL: https://www.wjgnet.com/2308-3840/full/v9/i4/353.htm
- DOI: https://dx.doi.org/10.13105/wjma.v9.i4.353