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. 2015 Oct 5;5(10):e007163. doi: 10.1136/bmjopen-2014-007163

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions

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The γ-distribution at different times in data set I. Green curve: the γ-distribution in 1998 for data set I; Blue curve: the γ-distribution in 2005 for data set I; Red curve: the γ-distribution in 2010 for data set I.