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van den Akker-van Marle ME, Moojen WA, Arts MP, Vleggeert-Lankamp CL, Peul WC; Leiden-The Hague Spine Intervention Prognostic Study Group (SIPS).van den Akker-van Marle ME, et al. Among authors: moojen wa.Spine J. 2016 Jun;16(6):702-10. doi: 10.1016/j.spinee.2014.10.017. Epub 2014 Oct 23.Spine J. 2016.PMID: 25452018