Figure 8.

Publication bias plot. Effect/size plot for trials with TENS/IF, LLLT and EA. Black circles indicate a single trial. Effect over placebo is related to teh x-axis and sample size is related to the y-axis.

Bjordal et al. BMC Musculoskeletal Disorders 2007 8:51   doi:10.1186/1471-2474-8-51
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