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Krakenes J, Kaale BR.Krakenes J, et al. Among authors: kaale br.Spine (Phila Pa 1976). 2006 Nov 15;31(24):2820-6. doi: 10.1097/01.brs.0000245871.15696.1f.Spine (Phila Pa 1976). 2006.PMID: 17108836Review.