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Figure 1 | BMC Medical Research Methodology

Figure 1

From: Reaching the hard-to-reach: a systematic review of strategies for improving health and medical research with socially disadvantaged groups

Figure 1

Flow chart of included studies. Footnote: a Did not report barriers or strategies to improve participation (n = 3118); Not socially disadvantaged group (n = 453); Focus on health service participation rather than health research participation (n = 91); Not English language (n = 58). b Focus on health service participation rather than health research participation (n = 53); Not socially disadvantaged group (n = 39).

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