The editors of the journal are retracting this article published previously in the Iranian Journal of Veterinary Surgery.۱ The aforementioned article was published in ۲۰۰۷ when the journal did not have an online submission system, yet. Recently, we realized that this article had been published elsewhere at the same time.۲ We could not determine which article was published first because of a lack of submission history in our system as mentioned above and changes in the editorial staff of the journal over time. More importantly, the corresponding author of the article was regretfully passed away in a plane crash in ۲۰۱۱, therefore, we could not investigate which journal had received the manuscript first. As a result, we decided to retract the article because of redundant publication.