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Leboeuf-Yde C, Kyvik KO.Leboeuf-Yde C, et al. Among authors: kyvik ko.Spine (Phila Pa 1976). 1998 Jan 15;23(2):228-34. doi: 10.1097/00007632-199801150-00015.Spine (Phila Pa 1976). 1998.PMID: 9474731