Open Access Highly Accessed Review

From concepts, theory, and evidence of heterogeneity of treatment effects to methodological approaches: a primer

Richard J Willke*, Zhiyuan Zheng, Prasun Subedi, Rikard Althin and C Daniel Mullins

BMC Medical Research Methodology 2012, 12:185  doi:10.1186/1471-2288-12-185

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