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Combined citation distribution for all 29,296 articles included in the calculation of the 2015 journal impact factor for all 74 orthopaedic journals. Frequency is plotted against the number of citations per publication. Inset is for zero to 10 times cited. Overall, 18,910/29,296 (64.5%) of 2013 and 2014 publications were not cited in 2015. IQR = interquartile range.
