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Table 1.

Levels of evidence.

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Fig 1.

PRISMA flow diagram.

Process of study identification and selection for outcome analysis [8].

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Table 2.

Study characteristics.

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Table 2 Expand

Table 3.

Risk of bias analysis.

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Table 4.

Extracted data from the selected papers.

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Table 5.

Best evidence synthesis of outcome measures.

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Table 5 Expand