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Walker MA, Schumacher J, Schmitz DG, McMullen WC, Ruoff WW, Crabill MR, Hawkins JF, Hogan PM, McClure SR, Vacek JR, Edwards JF, Helman RG, Frelier PF.Walker MA, et al. Among authors: helman rg.J Am Vet Med Assoc. 1998 Mar 15;212(6):848-51.J Am Vet Med Assoc. 1998.PMID: 9530425
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Schumacher J, Kemper DL, Helman RG, Edwards JL.Schumacher J, et al. Among authors: helman rg.J Am Vet Med Assoc. 1996 Jul 1;209(1):118-9.J Am Vet Med Assoc. 1996.PMID: 8926192
Craig JA, Helman RG, Walker M.Craig JA, et al. Among authors: helman rg.J Am Vet Med Assoc. 1985 May 15;186(10):1100-1.J Am Vet Med Assoc. 1985.PMID: 3997628
Helman RG, Adams LG, Bridges CH.Helman RG, et al.J Am Vet Med Assoc. 1993 Jan 1;202(1):129-32.J Am Vet Med Assoc. 1993.PMID: 8420900Review.No abstract available.