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Histogram for the CH evolution ratio covering 2008–2012 (left panel) and separately for the year 2008 (right panel). The derived median is given by a red vertical line.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
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