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Waters TR, Baron SL, Piacitelli LA, Anderson VP, Skov T, Haring-Sweeney M, Wall DK, Fine LJ.Waters TR, et al.Spine (Phila Pa 1976). 1999 Feb 15;24(4):386-94; discussion 395. doi: 10.1097/00007632-199902150-00019.Spine (Phila Pa 1976). 1999.PMID: 10065524