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Table 2: Results of the Mann-Whitney U test to compare the difference between total significant (>15%) single-source duplications of ORAs in AJNR and Radiology in 2011
Group No. Rank Average Sum of Ranks U Z P
AJNR 2011 11 12.59 138.5 59.5 0.61 .545
Radiology 2011 12 11.46 137.5
Note:—U indicates the Mann-Whitney U test.
Group	No.	Rank Average	Sum of Ranks	U	Z	P
AJNR 2011	11	12.59	138.5	59.5	0.61	.545
Radiology 2011	12	11.46	137.5	59.5	0.61	.545