Random-Effects Model (k = 3; tau^2 estimator: REML)

tau^2 (estimated amount of total heterogeneity): 113.2525 (SE = 318.5706)
tau (square root of estimated tau^2 value):      10.6420
I^2 (total heterogeneity / total variability):   35.57%
H^2 (total variability / sampling variability):  1.55

Test for Heterogeneity: 
Q(df = 2) = 3.1909, p-val = 0.2028

Model Results:

estimate       se     zval     pval    ci.lb    ci.ub          
-30.0327  10.2558  -2.9284   0.0034 -50.1337  -9.9317       ** 

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Signif. codes:  0 *** 0.001 ** 0.01 * 0.05 . 0.1   1 