Bmj
Source
Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement
2009 · David Moher, A. Liberati, et al. · BMJ
Measuring inconsistency in meta-analyses
2003 · Julian P. T. Higgins, Simon G. Thompson, et al. · BMJ
Bias in meta-analysis detected by a simple, graphical test
1997 · Matthias Egger, George Davey Smith, et al. · BMJ