Comments received on Walker's 'Odd man out' approach.

[1]  A. M. Walker,et al.  Odd man out: a graphical approach to meta-analysis. , 1988, American journal of public health.

[2]  B. Gladen,et al.  On graphing rate ratios. , 1983, American journal of epidemiology.

[3]  A. Lowenfels Comments on meta-analysis. , 1989, American journal of public health.