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Heavner JE, Calvillo O, Racz GB.Heavner JE, et al. Among authors: racz gb.Reg Anesth. 1997 May-Jun;22(3):257-9. doi: 10.1016/s1098-7339(06)80011-8.Reg Anesth. 1997.PMID: 9168218
Heavner JE, Boswell MV, Racz GB.Heavner JE, et al. Among authors: racz gb.Pain Physician. 2006 Apr;9(2):135-7.Pain Physician. 2006.PMID: 16703974Free article.