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Vasavada AN, Li S, Delp SL.Vasavada AN, et al. Among authors: delp sl.Spine (Phila Pa 1976). 1998 Feb 15;23(4):412-22. doi: 10.1097/00007632-199802150-00002.Spine (Phila Pa 1976). 1998.PMID: 9516695