Figure 2.

The nonspecific effect of acupuncture (difference between groups receiving sham acupuncture and no acupuncture). SD, standard deviation; Total, number of patients; 95% CI, 95% confidence interval; IV, inverse variance method; Random, random effects model; df, degrees of freedom.

Linde et al. BMC Medicine 2010 8:75   doi:10.1186/1741-7015-8-75
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