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Duggal N, Chamberlain RH, Park SC, Sonntag VK, Dickman CA, Crawford NR.Duggal N, et al. Among authors: chamberlain rh.Spine (Phila Pa 1976). 2005 Apr 1;30(7):E164-8. doi: 10.1097/01.brs.0000157418.20900.a1.Spine (Phila Pa 1976). 2005.PMID: 15803065