From: Retractions in cancer research: a systematic survey
Reason for retraction
Number
Percent
Duplicate publishing
162
28.4
Error
138
24.2
Fraud
104
18.2
Plagiarism
82
14.4
Authorship issues
22
3.9
Ethics issues
12
2.1
Not stated
56
9.8
Other
5
0.9
Total
571
100