This is a reproduction of the Molloy et al., 2004 meta-analysis with the data found in R's metafor package. For more information on the package visit: https://cran.r-project.org/web/packages/metafor/metafor.pdf Here's a link to the Molloy et al., 2004 paper: https://link.springer.com/content/pdf/10.1007/s12160-013-9524-4.pdf