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. 2015 Oct 8;10(10):e0139951. doi: 10.1371/journal.pone.0139951

Fig 1. Average cites per article over a 5 year period by NIH funding status and PMC status for 2006 & 2009 publications.

Fig 1

Citation data were collected in March 2014, when most (but not all) 2013 citation data were available in Scopus. The 2013 citation data are thus a slight underestimate of the true value, but this does not appear to have biased our PMC vs. non-PMC comparison.