2Neurosurgery, Affiliated Hospital of Inner Mongolia Medical University, Huhehaote, 010051, China; fax: +86 (0471) 663-7640; E-mail: email@example.com
Received May 4, 2013; Revision received September 13, 2013
The article published in Vol. 78, No. 12, pp. 1333-1341, DOI: 10.1134/S0006297913120031, has been retracted by the authors request. The authors have recently obtained new results conflicting with those presented in the published article. Careful analysis showed that some published results were obtained using inappropriate methods and wrong statistical analysis. The authors apologize and ask readers to ignore the results published in this article.