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Mirza SK, Chapman JR, Anderson PA.Mirza SK, et al. Among authors: chapman jr.Spine (Phila Pa 1976). 1997 Jun 15;22(12):1421-2. doi: 10.1097/00007632-199706150-00029.Spine (Phila Pa 1976). 1997.PMID: 9201851No abstract available.