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Table 1.

Classification and quality of studies.

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Table 2.

Tool to assess internal validity based on the Cochrane methodology [26].

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Fig 1.

PRISMA flow chart.

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Table 3.

Summary of the cost-effectiveness results according to intervention.

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Table 4.

Cost calculation for the studies included in the review.

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Table 5.

Reporting on CHEERS guidelines.

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