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Herkowitz HN, Abraham DJ, Albert TJ.Herkowitz HN, et al. Among authors: abraham dj.Spine (Phila Pa 1976). 1999 Jun 15;24(12):1268-70. doi: 10.1097/00007632-199906150-00018.Spine (Phila Pa 1976). 1999.PMID: 10382258Review.
Abraham DJ, Herkowitz HN.Abraham DJ, et al.Orthop Clin North Am. 1998 Oct;29(4):731-44. doi: 10.1016/s0030-5898(05)70044-4.Orthop Clin North Am. 1998.PMID: 9756968Review.