@article{egger1997-9310563,
  author  = {Egger, Matthias and Smith, George Davey and Schneider, Martin and Minder, C.},
  title   = {{Bias in meta-analysis detected by a simple, graphical test}},
  journal = {BMJ},
  year    = {1997},
  doi     = {10.1136/bmj.315.7109.629},
  pmid    = {9310563},
  url     = {https://doi.org/10.1136/bmj.315.7109.629}
}