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Marcia S, Boi C, Dragani M, Marini S, Marras M, Piras E, Anselmetti GC, Masala S.Marcia S, et al.Eur Spine J. 2012 May;21 Suppl 1(Suppl 1):S112-8. doi: 10.1007/s00586-012-2228-9. Epub 2012 Mar 21.Eur Spine J. 2012.PMID: 22434530Free PMC article.