Retraction Note to: Eur J Orthop Surg Traumatol (2014) 24:1061–1066 DOI 10.1007/s00590-013-1385-9

The authors have retracted this article because of double submission. This article was submitted to Acta Orthopædica Belgica in August 2013 then to the European Journal of Surgery and Traumatology (EJOST) in September 2013 which resulted in a double publication: In EJOST (October 2014, Volume 24, Issue 7, pp 1061–1066) and in Acta Orthopædica Belgica (2014, 80, 178–182). The authors take the full responsibility for this and would like to apologize Editors and readers.