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Figure S1. As in Figure 1 but plotted on a paper basis; that is, mean value is plotted if multiple estimates were provided in a single publication.

Table S1. Literature used in the historical meta-analysis.

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FilenameFormatSizeDescription
gcb2450-sup-sm_supplfig-f1.epsapplication/eps1002KSupporting info item
gcb2450-sup-sm_suppltable-t1.docWord document375KSupporting info item

Please note: Wiley-Blackwell is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.