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Table 1: 
Duplication in ORAs, AJNR 2011 and Radiology 2011
AJNR 2011Radiology 2011
Issues (No.)1112
ORAs (No.)302343
ORAs per issue (mean)27.528.6
ORAs per issue (SD)2.731.31
    With >15% duplication (No.)5412
    With >15% duplication (% of total)17.93.5
    With >15% duplication from a single source (No.)122
    With >15% duplication from a single source (% of total ORAs)40.6
    With >15% duplication from a single source (significant) (No.)21
    With >15% duplication from a single source (significant) (% of total ORAs)0.70.3