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Fig 1.

Study flow diagram.

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Table 1.

Characteristics of Included Studies.

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Table 2.

Pharmacological Intervention Categories.

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Fig 2.

Meta-analysis of pharmacological interventions.

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Table 3.

Results of Subgroup Analyses.

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Fig 3.

Meta-analysis of behavioural interventions.

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Fig 4.

Funnel plots of behavioural and pharmacological studies.

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Table 4.

Results of Trim-and-fill Analysis.

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