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WALKER, E., HERNANDEZ, A. V., & KATTAN, M. W. (2008). Meta-analysis: Its strengths and limitations. Cleveland Clinic Journal of Medicine, 75(6), 431-439. https://doi.org/10.3949/ccjm.75.6.431
WALKER E, HERNANDEZ AV, KATTAN MW. Meta-analysis: Its strengths and limitations. Cleveland Clinic Journal of Medicine. 2008;75(6):431-9.