Erratum to: Eur Spine J (2010) 19:2137–2148 DOI 10.1007/s00586-010-1503-x
The names of the co-authors Wilke, Graf, and Midderhoff were rendered incorrectly; they are corrected here.
Footnotes
The online version of the original article can be found under doi:10.1007/s00586-010-1503-x.