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. 2015 Feb 18;2(1):28–41. doi: 10.1093/jhps/hnv013

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© The Author 2015. Published by Oxford University Press

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 3. — (A) Mean MCMS over time for all continents combined. (B) Mean level of evidence over time for all continents combined. Note that lower numerical level of evidence is observed over later publication date, indicative of improved, rather than worse, level of evidence.