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Papagelopoulos PJ, Currier BL, Shaughnessy WJ, Sim FH, Ebsersold MJ, Bond JR, Unni KK.Papagelopoulos PJ, et al.Spine (Phila Pa 1976). 1998 Mar 1;23(5):621-8. doi: 10.1097/00007632-199803010-00018.Spine (Phila Pa 1976). 1998.PMID: 9530795