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Burns AS, Ditunno JF.Burns AS, et al. Among authors: ditunno jf.Spine (Phila Pa 1976). 2001 Dec 15;26(24 Suppl):S137-45. doi: 10.1097/00007632-200112151-00023.Spine (Phila Pa 1976). 2001.PMID: 11805621Review.