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Giurini JM, Chrzan JS, Gibbons GW, Habershaw GM.Giurini JM, et al.J Am Podiatr Med Assoc. 1991 Apr;81(4):167-73. doi: 10.7547/87507315-81-4-167.J Am Podiatr Med Assoc. 1991.PMID: 1875289