This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy26854055).
The Turkish Association of Orthopaedics and Traumatology regrets to inform that the above mentioned article (http://www.aott.org.tr/index.php/aott/article/view/3194/4029) has been retracted based on authors' request as they declared that the data provided in the article was not correct and copied from another study by mistake. This error was recognized only after the publication and correcting the results would create a major change in the conclusion of the study.