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Bias in meta-analysis detected by a simple, graphical testMatthias Egger; George Davey Smith; Martin Schneider; Christoph MinderBritish Medical Journal; Sep 13, 1997; 315, 7109; Academic Research Librarypg. 629

Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.

Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.

Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.

Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.

Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.