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Strömqvist B, Fritzell P, Hägg O, Jönsson B, Sandén B; Swedish Society of Spinal Surgeons.Strömqvist B, et al. Among authors: sanden b.Eur Spine J. 2013 Apr;22(4):953-74. doi: 10.1007/s00586-013-2758-9.Eur Spine J. 2013.PMID: 23575657Free PMC article.