Erratum to: Eur Spine J (2011) 20:1584–1586 DOI 10.1007/s00586-011-1997-x
The following affiliation was omitted:
I.R.C.C.S Istituto Ortopedico Galeazzi, Milan, Italy.
e-mail: c.lamartina@chirurgiavertebrale.net.
Footnotes
The online version of the original article can be found under doi:10.1007/s00586-011-1997-x.