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Cook SD, Dalton JE, Tan EH, Whitecloud TS 3rd, Rueger DC.Cook SD, et al.Spine (Phila Pa 1976). 1994 Aug 1;19(15):1655-63. doi: 10.1097/00007632-199408000-00002.Spine (Phila Pa 1976). 1994.PMID: 7973957