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Table 1.

Inclusion and exclusion criteria.

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Fig 1.

PRISMA flowchart of study inclusion.

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Table 2.

Study characteristics.

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Table 3.

Summary of included studies (PICO).

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Table 3 Expand

Fig 2.

Risk of bias bar graph.

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Table 4.

Risk of bias assessment.

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Table 4 Expand

Fig 3.

TIDieR table for quality of reporting.

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Fig 3 Expand