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Table S1. Details of the included studies.

Table S2. Results of meta-regression analysis.

Data S1. Powerpoint slides summarising the study.

FilenameFormatSizeDescription
BJO_3055_sm_TableS1.pdf99KSupporting info item
BJO_3055_sm_DataS1.ppt616KSupporting info item
BJO_3055_sm_TableS2.pdf27KSupporting info item

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