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Eicker SO, Cornelius JF, Steiger HJ, Hänggi D.Eicker SO, et al.Eur Spine J. 2012 Jun;21(6):1207-13. doi: 10.1007/s00586-012-2150-1. Epub 2012 Jan 11.Eur Spine J. 2012.PMID: 22234723Free PMC article.
Eicker SO, Klingenhöfer M, Stummer W, Steiger HJ, Hänggi D.Eicker SO, et al.Eur Spine J. 2012 Dec;21(12):2487-91. doi: 10.1007/s00586-012-2392-y. Epub 2012 Jun 16.Eur Spine J. 2012.PMID: 22706668Free PMC article.